Advanced 18 min
The Hidden Cost of Email Deliverability Failures for Enterprises
What CFOs and IT leaders need to know about the ROI of email authentication. US breach costs hit an all-time record, making SPF and DKIM essential.
Tag
SPF
384 articles
Advanced 9 min
SPF Flattening vs SPF Macros vs SPF Compression
AutoSPF – Automatic SPF flattening SPF Flattening vs SPF Macros vs SPF Compression Play Episode Pause Episode Mute/Unmute Episode Rewind 10 Seconds 1x Fast.
Intermediate 6 min
Gmail Spf Setup Guide: Configure Spf For Google Workspace Easily
Sender Policy Framework (SPF) is an open email authentication standard that helps receiving mail servers verify which hosts are authorized to send email for.
Intermediate 12 min
SPF Record Syntax Rules: Avoid Errors That Break Email Delivery
To avoid SPF record syntax errors that break email delivery, publish exactly one TXT record that begins with v=spf1.
Advanced 26 min
Best SPF Flattening Tools in 2026: The Complete Guide
In this guide, we cover what SPF flattening is, why it matters for every organization sending email in 2026.
Intermediate 7 min
How To Check SPF Records Using Nslookup Powershell, Dig, Or Other DNS Tools
Sender Policy Framework (SPF) is a DNS authentication standard that helps receiving mail servers verify which IP ranges are authorized to send mail for a given.
Intermediate 5 min
Why Yahoo Is Blocking Your Emails And How To Fix “Sender Is Unauthenticated”?
AutoSPF – Automatic SPF flattening Why Yahoo Is Blocking Your Emails And How To Fix “Sender Is Unauthenticated”?
Advanced 12 min
How can I run an SPF lookup for multiple domains at scale?
Use an asynchronous, rate-limited DNS worker pool that tracks SPF’s 10-lookup budget, parses mechanisms (include, redirect, a, mx, ptr.
Advanced 18 min
SPF Flattening: The Hidden Email Infrastructure Problem Costing Businesses Billions
Why the obscure 10-DNS-lookup limit is now one of the most consequential technical constraints in modern email, and what you should do about it.
Intermediate 7 min
Why Should You Avoid Using SPF Ptr Mechanisms In Email Authentication?
The SPF PTR approach is widely discouraged because it depends on reverse DNS that you do not control, generates extra DNS lookup overhead.
Advanced 13 min
Which Monitoring Approaches Are Best for Detecting SPF Delivery Problems in Office 365?
A layered monitoring program for SPF problems in Office 365 — EOP/Defender alerts, DMARC analytics, header parsing, SPF DNS validation, Sentinel correlation, and synthetic tests.
Intermediate 6 min
How to Fix SPF Fail Email Errors and Improve Deliverability
Diagnose SPF fail errors from Received-SPF headers and bounce messages, fix the root cause — wrong IPs, missing includes, duplicate records, or the 10-lookup limit — and keep deliverability steady.
Advanced 14 min
How Can I Diagnose the Root Causes of an SPF PermError in My DNS Records?
SPF PermError means your domain's SPF policy is permanently unrecoverable. Learn how to diagnose root causes — from the 10 DNS lookup limit to NXDOMAIN includes, circular references, and TXT segmentation — with dig, spfquery, and DMARC correlation.
Foundational 8 min
How RFC 7208 Powers SPF: A Simple Guide for Domain Owners
RFC 7208 is the official IETF standard that defines how SPF works — from record syntax and mechanisms to DNS lookup limits and result qualifiers. This guide explains what domain owners need to know about the framework powering email authentication.
Intermediate 8 min
Gmail SPF Record Setup: A Practical Guide for Google Workspace
Learn how to set up SPF records for Google Workspace — from the baseline include:_spf.google.com record to mapping third-party senders, managing DNS permissions, and avoiding the 10-lookup limit.
Intermediate 6 min
Valimail Alternatives for SPF Management in 2026
Comparing Valimail Instant SPF against AutoSPF, PowerDMARC, Redsift, DMARCLY, EasyDMARC, and MxToolbox. Feature comparison for teams evaluating Valimail alternatives.
Intermediate 6 min
DMARCLY Alternatives for SPF and DMARC in 2026
Comparing DMARCLY Safe SPF against AutoSPF, PowerDMARC, EasyDMARC, dmarcian, Redsift, and Valimail. Feature comparison with honest pricing and use-case guidance.
Intermediate 9 min
NIS2 vs DORA vs GDPR: A practical guide for EU businesses
Cybersecurity rules in the EU are getting stricter, and businesses can no longer treat them as optional.
Intermediate 6 min
EasyDMARC Alternatives for SPF and DMARC Management in 2026
Comparing EasyDMARC against AutoSPF, PowerDMARC, DMARCLY, dmarcian, Redsift OnDMARC, and Valimail for SPF and DMARC management. Feature comparison with honest use-case guidance.
Intermediate 12 min
What are the best practices for creating an SPF record that passes Kitterman SPF validation?
To create an SPF record that consistently passes Kitterman SPF validation, you must adhere strictly to RFC 7208 syntax (one TXT record starting with v=spf1).
Advanced 5 min
Automating SPF Record Management: A Smarter Approach For MSSPs
MSSPs often manage dozens or even hundreds of client domains, each with its own SPF configuration. Handling this manually can quickly become overwhelming.
Advanced 12 min
How can I create a valid SPF record that passes Google’s validation for multiple third-party senders?
To create a valid SPF record that passes Google’s validation for multiple third‑party senders.
Intermediate 8 min
PowerDMARC Alternatives for SPF Management in 2026
Comparing PowerDMARC PowerSPF against AutoSPF, MxToolbox, DMARCLY Safe SPF, Redsift Dynamic SPF, and Valimail Instant SPF for managing the 10-DNS-lookup limit. Honest feature comparison with pricing and use-case guidance.
Intermediate 9 min
Think Your SPF Is Fine? An SPF Validator Might Prove You Wrong
Yes—an SPF validator frequently uncovers hidden errors (lookup-limit breaches, missing or mistyped includes, misordered mechanisms, permissive all.
Intermediate 9 min
Best SPF Flattening Tools and Services in 2026: Honest Comparison
An honest comparison of the 7 best SPF flattening tools in 2026 — AutoSPF, PowerDMARC PowerSPF, MxToolbox, DMARCLY Safe SPF, Redsift Dynamic SPF, Valimail Instant SPF, and DMARCDuty. Each approach explained with real tradeoffs.
Intermediate 8 min
A Guide On Preventing Your Emails From Getting Placed In Spam Folders
Getting emails into the inbox is not just about writing a good message; it’s about proving, again and again, that your emails deserve to be there.
Foundational 7 min
Best Free SPF Checker Tools in 2026: Detailed Comparison
A side-by-side comparison of the 8 best free SPF record checker tools in 2026 — AutoSPF, MxToolbox, dmarcian, EasyDMARC, DMARCLY, PowerDMARC, Mailtrap, and DNS Checker. Each tool tested against the same domain with real results.
Intermediate 10 min
Why does SPF record syntax include mechanisms like “include” and “all”?
SPF syntax includes mechanisms like include and all so domain owners can modularly authorize many disparate sending sources (include) while enforcing a clear.
Intermediate 4 min
SPF PermError vs SPF TempError: What’s the Difference?
When your outgoing email does not return a normal pass or fail SPF, you might think that the message was simply not authenticated.
Foundational 8 min
SPF Record Examples: Copy-Paste Records for Google, Microsoft 365, SendGrid & More (2026)
Copy-paste SPF TXT records for the 10 most common email vendor combinations. Each example shows the exact DNS record, the lookup count, and what to watch out for.
Intermediate 12 min
What is the most common SPF checker finding that indicates misconfigured include statements?
The most common SPF checker finding that indicates misconfigured include statements is that the included domain publishes no SPF record (e.g., include:vendor.
Foundational 12 min
How can I reduce DNS lookups reported by an SPF lookup to avoid exceeding limits?
You reduce DNS lookups in SPF by replacing lookup-heavy mechanisms (include, a, mx, ptr, exists) with explicit ip4/ip6 entries.
Intermediate 8 min
Understanding Gmail’s HIPAA Compliance: What Businesses Must Know
HIPAA compliance means protecting sensitive patient data, also called protected health information or PHI.
Advanced 12 min
What limitations should I be aware of when relying on an SPF record tester?
SPF record testers are valuable diagnostics but they can mislead you because they may not fully enforce the 10-DNS-lookup limit (especially with nested.
Foundational 10 min
What Is RFC 7208? Understanding The SPF Standard Behind Email Authentication
RFC stands for Request for Comments, a series of documents used by the Internet community to publish technical guidelines, protocols.
Advanced 12 min
The Hidden Rules of SPF Record Syntax You’re Probably Missing
The hidden SPF syntax rules most teams miss are that SPF evaluates mechanisms left-to-right and stops at the first match; only one SPF TXT record is allowed;.
Intermediate 14 min
From DNS to Deliverability: Why an SPF Record Tester Matters
An SPF record tester matters because it verifies your DNS-published sender authorizations end-to-end.
Advanced 12 min
How can I interpret the results from an SPF record checker if I see multiple include mechanisms?
If an SPF checker shows multiple include mechanisms, interpret each as a delegated check of another domain’s SPF that is evaluated left-to-right for the same.
Intermediate 5 min
CNAME vs Alias records: Here’s what you should know about them
Email ecosystems these days are no longer limited to only a couple of email servers.
Intermediate 13 min
What causes an SPF validator to report lookup limit or mechanism count issues?
An SPF validator reports lookup-limit or mechanism-count issues when evaluating a sender’s SPF policy would require more than 10 DNS-querying.
Foundational 12 min
From Zero to Secure: Creating an SPF Record for Your Domain
To create an SPF record from scratch and secure your domain, publish a DNS TXT record at your sending domain in the form v=spf1 [authorized senders] -all.
Advanced 12 min
SPF Flattening for Growing Domains: Preventing SPF Failures and Lookup Errors
To prevent SPF failures and DNS lookup errors as your domain grows.
Advanced 12 min
What are the best practices illustrated by an SPF record example to avoid DNS lookup limits?
The best practices to avoid SPF DNS lookup limits are to use only necessary lookup‑triggering mechanisms, prefer ip4/ip6 literals and CIDR ranges.
Intermediate 5 min
NCSC is retiring Web Check and Mail Check: Here’s what it means for security teams
Back in 2017, when the web wasn’t as structured as it is today from a security standpoint.
Intermediate 12 min
How can I interpret the results of an SPF lookup to find configuration errors?
You can interpret SPF lookup results to find configuration errors by parsing the record’s mechanisms and qualifiers in order.
Intermediate 10 min
Avoid Email Spoofing with Sender Policy Framework Office 365 Configuration
To avoid email spoofing with Sender Policy Framework (SPF) in Office 365, publish a correct SPF TXT record (typically v=spf1 include:spf.protection.outlook.
Intermediate 6 min
How To Set Up SPF For Avanan: Here’s What You Should Know
It’s 2026, and companies no longer use traditional on-premise email servers; they have now moved to cloud platforms like Microsoft 365 and Google Workspace.
Advanced 13 min
Advanced SPF Record Testing: Protect Your Domain from Permerror Issues
To protect your domain from SPF permerror issues, enforce strict syntax validation.
Foundational 12 min
SPF Lookup in 2026: Best Practices for Secure Email Authentication
In 2026, the best practices for secure SPF lookups are to keep SPF within the 10-DNS-lookup limit by optimizing and (selectively) flattening includes.
Advanced 6 min
How should you implement DMARC as an MSP or an enterprise?
Most guides treat DMARC deployment as a two-step process: publishing the DNS record and monitoring its performance.
Intermediate 12 min
Why Multiple SPF Records Lead to Authentication Failures
Multiple SPF records lead to authentication failures because RFC 7208 requires exactly one “v=spf1” policy per domain.
Foundational 13 min
When SPF Permerror Disrupts Delivery: Hidden Causes You’re Missing
SPF permerror disrupts delivery when your SPF record has syntax faults (missing v=spf1, invalid qualifiers, malformed ip4/ip6 or macros).
Intermediate 9 min
Why Email Delivery Failures Happen And How To Fix Them In 2026
Email delivery failure in 2026 is no longer just about an email “bouncing.
Intermediate 12 min
Why would an SPF record example show a "~all" or "-all" policy and what are the implications?
An SPF record shows “all” (softfail) when a domain wants receivers to treat non-authorized senders as suspicious but typically still accept and score them.
Advanced 12 min
What are the best practices an SPF record generator should enforce for reliability?
An SPF record generator should enforce RFC 7208–compliant syntax and semantics; cap and flatten DNS lookups to stay under the 10-lookup limit; manage record.
Intermediate 12 min
SPF Lookup Best Practices: How to Configure and Maintain Accurate SPF Records
To configure and maintain accurate SPF records, build a minimal, syntactically correct policy per sending identity.
Intermediate 6 min
550 From address violates UsernameCaseMapped Policy: Why does this happen, and how to fix it?
For an email to reach the recipient, it must meet the specific requirements set by the receiving server, which govern address syntax, authentication.
Advanced 10 min
Avoid Email Authentication Failures in Office 365 with SPF
To avoid email authentication failures in Office 365 with SPF, publish a single authoritative SPF TXT record for each sending domain (typically v=spf1.
Advanced 11 min
Advanced SPF Flattening Implementation for Reliable Email Authentication
To implement advanced SPF flattening for reliable email authentication.
Intermediate 9 min
Avoiding the common SPF and DKIM mistakes in 2026
Email authentication is no longer a “set it once and forget it” task.
Advanced 11 min
What Are The Best Practices An SPF Checker Should Recommend For Maintaining SPF Records?
The best practices an SPF checker should recommend are to keep records within the 10-lookup and size limits.
Intermediate 12 min
How does an SPF record example differ from DKIM and DMARC examples for email authentication?
An SPF record example differs from DKIM and DMARC examples because SPF is a domain-level TXT that lists authorized sending hosts evaluated at SMTP envelope.
Intermediate 12 min
SPF Checker Online: Ensure Compliance With Email Authentication Standards
Google’s SPF checker most often reports “no SPF record” when the domain publishes only the deprecated SPF resource record (not a TXT).
Intermediate 13 min
How does an incorrect SPF record affect my protection in Mimecast against spoofing?
An incorrect SPF record reduces Mimecast’s spoofing protection by causing SPF evaluation errors (fail, softfail, neutral, temperror, permerror).
Intermediate 13 min
What causes DKIM or SPF failures and how can I recognize them?
DKIM and SPF typically fail due to DNS record mistakes, signature-breaking message modifications, identity alignment mismatches, SPF’s 10-lookup limit.
Foundational 7 min
How to avoid spam and phishing emails in your inbox
Spam and phishing emails are no longer just a minor inconvenience sitting quietly in your junk folder.
Intermediate 11 min
What common SPF configuration mistakes cause Google to flag emails?
Google most commonly flags emails when SPF is misconfigured—specifically multiple or duplicate SPF TXT records, exceeding the 10 DNS-lookup limit.
Intermediate 12 min
How can I update my DNS to change the SPF "all" policy without causing mail failures?
To update your DNS and change the SPF “all” policy without causing mail failures, first inventory and authorize every legitimate sender, reduce DNS TTLs.
Intermediate 12 min
How can I troubleshoot DKIM and SPF failures reported by mailbox providers?
To troubleshoot DKIM and SPF failures reported by mailbox providers, parse bounce and Authentication-Results data to separate SPF from DKIM issues.
Advanced 13 min
How do SPF flattening tools affect DMARC and DKIM enforcement?
SPF flattening tools improve DMARC SPF alignment reliability by reducing DNS lookup failures and timeouts but do not directly affect DKIM; when well-maintained.
Intermediate 12 min
What is the correct DNS record format to replace multiple SPF TXT records with a single valid one?
Publish a single DNS TXT record at the domain that begins with v=spf1 and combines all mechanisms (for example: “v=spf1 ip4:203.0.113.
Intermediate 12 min
How can I combine an SPF generator with DKIM and DMARC for better deliverability?
Combine an SPF generator with DKIM and DMARC for better deliverability by using AutoSPF to produce a single.
Foundational 7 min
General email authentication and sender requirements for WooCommerce
WooCommerce stores rely heavily on email for everyday operations, from order confirmations and shipping updates to password resets and marketing campaigns.
Foundational 13 min
Why does incorrect SPF syntax cause my legitimate emails to be marked as spam?
Incorrect SPF syntax causes legitimate emails to be marked as spam because receiving mail servers strictly parse SPF TXT records.
Foundational 12 min
What are the common causes shown in an SPF record breakdown that lead to SPF failures?
The most common causes shown in an SPF record breakdown that lead to SPF failures are syntax/format errors (missing v=spf1, malformed mechanisms.
Intermediate 11 min
How can I tell if "spf ~all" is causing my emails to be marked as spam?
You can tell if “spf all” is causing your emails to land in spam by confirming spf=softfail in the message headers.
Intermediate 12 min
How can I create a valid SPF record format for a domain that uses multiple email providers?
You can create a valid SPF record for a domain that uses multiple email providers by starting with “v=spf1”.
Foundational 11 min
What Happens To My Email Deliverability If My SendGrid SPF Record Is Missing Or Misconfigured?
If your SendGrid SPF record is missing or misconfigured, recipient servers will treat your messages as unauthenticated.
Intermediate 9 min
SPF Syntax Limits Explained: Includes, Lookups, and the 10-DNS Rule
"SPF syntax is deceptively simple," says Adam Lundrigan, CTO of DuoCircle.
Advanced 11 min
What Causes An Email To Be Rejected For Sender Policy Framework After A DNS Change?
Emails are typically rejected for SPF after a DNS change because receiving servers still reference cached/propagating DNS data.
Intermediate 12 min
How Can I Determine Whether I Need An SMTP Relay Service Provider For My Business Emails?
You need an SMTP relay provider if your sending volume, deliverability risk, compliance burden.
Intermediate 5 min
Common SPF and DKIM Misconfigurations That Hurt Deliverability
With cyberattacks becoming so severe and sophisticated, your organization cannot afford to leave its email ecosystem inadequately protected.
Advanced 12 min
Which Are The Best Practices For Managing SPF Records Across Multiple Office 365 Domains?
The best practices for managing SPF records across multiple Office 365 domains are to use a per-domain baseline of v=spf1 include:spf.protection.outlook.
Advanced 13 min
What Are The Most Common Issues Highlighted In An SPF Record Breakdown?
The most common issues highlighted in an SPF record breakdown are syntax and qualifier mistakes (missing v=spf1, multiple records, malformed mechanisms).
Intermediate 11 min
What Are The Best Practices For Creating An SPF Record For Domains Managed Through GoDaddy?
The best practices for creating an SPF record for domains managed through GoDaddy are to publish a single TXT “v=spf1” record at the exact sending domain that.
Advanced 12 min
How Do I Verify That Google Recognizes My Domain's SPF Record?
To verify that Google recognizes your domain’s SPF record, first query your SPF TXT record via public resolvers (for example, dig +short TXT yourdomain.com @8.
Intermediate 6 min
Rackspace SPF & DKIM Configuration: A Professional Guide By AutoSPF
Email authentication is a cornerstone of modern email security and deliverability.
Intermediate 6 min
How to Check Email Sender Reputation and Improve It
"Email deliverability starts with authentication," says Brad Slavin, CEO of DuoCircle.
Intermediate 12 min
Can I Use Google Domains To Automatically Configure SPF Records For My Email Provider?
Yes—but with limits: Google Domains can automatically add an SPF record when you use its guided setup for Google Workspace.
Advanced 13 min
What Are The Best Practices For Configuring SPF When Using Office 365?
The best practices for configuring SPF with Office 365 are to publish a single, centralized SPF policy that includes include:spf.protection.outlook.
Intermediate 6 min
The Ultimate AutoSPF Guide To Zendesk SPF & DKIM Configuration
In today’s email‑centric world, ensuring that your support and outbound emails are trusted by inbox providers like Gmail, Outlook, Yahoo.
Advanced 11 min
How Does An SPF Record Example Differ From DKIM And DMARC Examples?
An SPF record example differs from DKIM and DMARC examples in DNS type, purpose.
Foundational 6 min
How to Create and Publish an SPF Record Without Breaking Email
Creating an SPF record seems simple as it requires adding the list of servers allowed to send emails on your behalf and publishing it in your DNS.
Intermediate 13 min
How can I combine SPF record testing with DKIM and DMARC checks to improve security?
Combine SPF record testing with DKIM and DMARC by staging end-to-end authentication on a subdomain, validating SPF under the 10-lookup limit.
Foundational 13 min
How can I use an SPF record tester to check if my domain's SPF is configured correctly?
Enter your domain (or paste its v=spf1 TXT) into an SPF record tester.
Intermediate 8 min
What is ARP spoofing, and how to detect and prevent it
ARP spoofing, also known as ARP poisoning, is a type of network attack that targets how devices communicate inside a local network.
Advanced 7 min
Mastering Postmark SPF & DKIM Setup — An AutoSPF Guide to Bulletproof Email Authentication
When you send email from your systems — whether it’s transactional notifications, marketing campaigns, or account alerts.
Advanced 13 min
How can I fix an spf permerror caused by an overly long SPF record?
To fix an SPF PermError caused by an overly long SPF record, you must diagnose the exact cause (string length, DNS lookup count, or syntax).
Intermediate 7 min
AutoSPF Explains: The Definitive Guide to Adding an SPF Record to Cloudflare
Email is one of the most powerful communication tools in the digital age — but with that power comes responsibility.
Foundational 14 min
How can I interpret the "pass", "fail", and "neutral" results from an SPF checker?
An SPF “pass” means the connecting IP is authorized to send mail for the checked identity (MAIL FROM or HELO) per the domain’s SPF record.
Foundational 7 min
SPF Authentication Explained by AutoSPF: Why the ‘all’ Mechanism Matters and How To Use It Well
Email authentication plays a foundational role in protecting your domain, your brand reputation, and your users from phishing, spoofing.
Foundational 11 min
What are the most common SPF record mechanisms and modifiers in the syntax?
The most common SPF mechanisms are a, mx, ip4, ip6, include, exists, ptr (discouraged), and all, each optionally prefixed by qualifiers + (pass), – (fail).
Intermediate 7 min
Mastering SparkPost SPF & DKIM Setup — A Complete Guide by AutoSPF
In today’s email ecosystem, ensuring that your messages actually reach the inbox — and aren’t mistaken for spam or phishing — is more critical than ever.
Intermediate 8 min
SpamHero SPF & DKIM Configuration: The Complete Guide from AutoSPF
At AutoSPF, we know that email authentication isn’t an optional add-on.
Intermediate 11 min
Which IP addresses and domains should be included in an SPF record for Office 365?
For Office 365 (Microsoft 365 Exchange Online), your SPF record should at minimum be v=spf1 include:spf.protection.outlook.com -all (or include:spf.protection.
Foundational 12 min
Common SPF Record Examples and How to Implement Them Correctly
The correct way to implement common SPF records is to publish a single TXT record per sending domain or subdomain that begins with v=spf1.
Intermediate 12 min
SPF Validator Insights: Detect Errors Before They Impact Email Deliverability
To detect errors before they impact email deliverability, an SPF validator must execute a fully RFC-7208–compliant DNS and macro evaluation (including include.
Intermediate 6 min
Mailjet SPF and DKIM Setup: A Complete Deliverability Guide by AutoSPF
Email deliverability is not a guessing game.
Foundational 11 min
What are the initial troubleshooting steps Kitterman suggests when SPF checks fail?
Kitterman’s initial troubleshooting steps are to read the receiver’s Authentication-Results to identify the precise SPF result (fail, softfail, neutral.
Intermediate 6 min
AutoSPF’s Complete Guide to Proofpoint Essentials: SPF & DKIM Configuration for Maximum Email Security
In today’s email-driven world, securing your domain’s email communication is non-negotiable.
Intermediate 11 min
Why do SPF record checkers report "too many DNS lookups" and how does that affect delivery?
SPF record checkers report “too many DNS lookups” because the SPF standard (RFC 7208) limits SPF evaluation to 10 DNS-querying mechanisms (include, a, mx, ptr.
Intermediate 7 min
Mimecast SPF & DKIM Configuration: An Authoritative Guide by AutoSPF
To authenticate email sent through Mimecast, add the region-specific include (e.g., include:_netblocks.mimecast.com for US, or the EU/AU equivalent) to your SPF record and configure DKIM signing via the Mimecast Administration Console. The exact include differs by Mimecast deployment region.
Intermediate 11 min
Why does an SPF record example sometimes cause legitimate emails to be marked as spam?
An SPF record example can cause legitimate emails to be marked as spam when it includes syntax errors, duplicated or misordered mechanisms.
Advanced 7 min
From Monitoring to Enforcement: Building a Scalable DMARC Strategy for Long-Term Email Protection
Protecting your entire email ecosystem and ensuring that an attacker cannot intercept or spoof your outgoing emails requires more than just cursory checks.
Intermediate 7 min
NetSuite SPF and DKIM Configuration — A Definitive Guide by AutoSPF
In today’s digital world, the success of your email communications doesn’t just depend on creative copy or timely outreach.
Foundational 11 min
Why should I use an SPF validator before making DNS changes?
You should use an SPF validator before making DNS changes because it catches syntax and policy errors, simulates the impact of proposed TXT records.
Foundational 6 min
Mandrill SPF & DKIM Configuration: A Complete Step-by-Step Guide by AutoSPF
Email deliverability is no longer optional—it’s foundational.
Intermediate 12 min
How SPF Record Syntax Impacts Email Security and Inbox Placement
SPF record syntax—specifically the v=spf1 declaration, the order and choice of mechanisms, their qualifiers.
Intermediate 13 min
Can an SPF record checker detect if a domain is being spoofed or used for phishing?
Yes—but only partially: an SPF record checker can tell you whether the sending IP is authorized to use a domain’s envelope-from/HELO and whether that aligns.
Advanced 12 min
Why does SPF flattening become necessary when a domain exceeds the DNS lookup limit?
SPF flattening becomes necessary when a domain exceeds the SPF specification’s 10-DNS-lookup limit because flattening converts lookup-driven mechanisms.
Advanced 6 min
SPF Mechanism Ordering: How Sequence Impacts Email Deliverability and DNS Lookup Limits
"From an engineering perspective, the 10-lookup limit is a resource protection mechanism, not a security feature," says Adam Lundrigan, CTO of DuoCircle.
Intermediate 7 min
Definitive Guide to Microsoft 365 SPF & DKIM Configuration
At AutoSPF, our mission is simple: help organizations optimize email deliverability and security with the right sender authentication setup.
Intermediate 12 min
What Is The Correct SPF Record Format For Including IP Addresses And Domains?
The correct SPF record format for including IP addresses and domains is to publish a single TXT record starting with v=spf1 that lists IPv4/IPv6 sources via.
Intermediate 8 min
AutoSPF’s Complete Guide to Setting Up Mailgun SPF & DKIM for Reliable Email Delivery
Deliverability is one of the most critical challenges any modern business faces when sending email at scale.
Foundational 12 min
How can I create a correct SPF record for my domain using an SPF record generator?
To create a correct SPF record with an SPF generator, inventory every legitimate sending source (your mail server IPs/hosts, outbound gateways.
Intermediate 7 min
AutoSPF Complete Guide to Configuring SPF and DKIM for MailerLite
Email deliverability doesn’t happen by accident.
Intermediate 7 min
Why email authentication rules are stricter for bulk senders (and what to do about it)
As phishing rates rise, email authentication is no longer a ‘nice to have’ even for low-volume senders.
Intermediate 11 min
How can I create an SPF record for Office 365 without breaking other mail services?
To create an SPF record for Office 365 without breaking other mail services, inventory all legitimate senders.
Advanced 6 min
Mastering SPF & DKIM for SendGrid — An AutoSPF Guide to Email Authentication
In today’s digital world, email is still one of the most powerful tools for communication — whether for marketing, notifications, or transactional messages.
Advanced 12 min
What Are The Best Practices For Keeping SPF Record Syntax Short And Maintainable?
To keep SPF record syntax short and maintainable, use explicit ip4/ip6 ranges and a minimal set of a/mx/including mechanisms, avoid ptr/exists/exp.
Foundational 14 min
What is an SPF lookup and why does it matter for email delivery?
An SPF lookup is the DNS-based check mail servers perform to verify that the sending IP is authorized by a domain’s SPF record.
Foundational 6 min
AutoSPF’s Complete Guide: How to Add an SPF Record in Namecheap
In today’s digital world, securing your email domain against spoofing, phishing, and spam isn’t just a technical best practice.
Intermediate 5 min
How to set up SPF for Avanan– A step-by-step guide
Avanan is a cloud-native email security platform that helps secure email in Microsoft 365 and Google Workspace.
Foundational 8 min
Complete Guide to Setting Up FreshMail DKIM and SPF Records
In today’s email ecosystem, ensuring your messages are authenticated and trusted by recipients isn’t just a nice-to-have — it’s essential.
Intermediate 12 min
Why does my SPF record syntax exceed the 255-character limit and how do I fix it?
Your SPF record “exceeds 255 characters” because DNS TXT records cap each quoted character-string at 255 bytes (per RFC 1035) and long SPF policies must be.
Foundational 6 min
What is SPF flattening, and why is it important?
"The misconception about SPF flattening is that it's a one-time fix," says Adam Lundrigan, CTO of DuoCircle and architect of AutoSPF's flattening engine.
Advanced 16 min
When should I avoid SPF flattening and rely on alternative authentication strategies?
You should avoid SPF flattening whenever your sending footprint is dynamic (CDNs, cloud ESPs with fast-changing IPs).
Intermediate 8 min
Complete Guide by AutoSPF: How to Configure SPF and DKIM for Exclaimer and Secure Your Email Domain
Email authentication is one of the most critical foundations for protecting your brand and domain from spoofing, phishing, and deliverability problems.
Intermediate 16 min
How can I find which sending IP produced the spf=permerror result in message headers?
To find which sending IP produced spf=permerror in message headers, locate the Authentication-Results line that reports spf=permerror.
Advanced 17 min
Office 365 SPF Best Practices: Protecting Your Domain From Spoofing
The best-practice SPF configuration for Office 365 is to publish a single TXT record of v=spf1 include:spf.protection.outlook.
Intermediate 9 min
How AutoSPF Enables SPF & DKIM in cPanel — A Friendly Deep Dive
As AutoSPF, I live and breathe email-authentication best practices.
Intermediate 18 min
Best practices for SPF record syntax to avoid the "permerror" from receivers?
To avoid SPF permerror with receivers, publish exactly one TXT record beginning with v=spf1 that uses only valid mechanisms/modifiers.
Foundational 8 min
Elkdata OÜ: SPF & DKIM Configuration — A Step-by-Step Guide by AutoSPF
At AutoSPF, we believe that proper email authentication is the foundation of secure and reliable email communication.
Intermediate 16 min
How can I use SPF lookup results to troubleshoot email deliverability problems?
You use SPF lookup results by reading the Authentication-Results/Received-SPF headers to see which IP, mechanism.
Advanced 14 min
What Is Kitterman SPF And How Does It Help With Email Deliverability?
Kitterman SPF is a free, standards‑aligned online SPF generator and validator that parses your domain’s SPF record, simulates real‑world checks (mechanisms.
Advanced 8 min
AutoSPF’s In-Depth Guide to Setting Up DMARC, SPF & DKIM on HostGator
Email spoofing, phishing, and other unauthorized email-domain abuse are serious threats — for everyday websites, businesses, and brands of all sizes.
Foundational 8 min
How has email authentication evolved over the years?
Did you know that email was never meant to be secure because cybercriminals were never meant to target it in the first place?
Intermediate 8 min
AutoSPF Guide: How to Configure SPF & DKIM with Barracuda
Email spoofing, phishing, and deliverability issues remain a big challenge for any organisation sending email at scale.
Intermediate 7 min
AutoSPF Explains: How to Configure AuthSMTP with SPF & DKIM for Better Email Deliverability
In today’s email-heavy world, protecting your domain against spoofing, phishing, and spam is not just a nice-to-have — it’s essential.
Intermediate 16 min
What are common signs that multiple SPF records are breaking SPF authentication?
The most common signs that multiple SPF records are breaking SPF authentication are: DNS for your domain returns more than one v=spf1 TXT (or both TXT and.
Intermediate 6 min
Google Updates SPF Records: What Domain Owners Need to Fix in 2026
Google's 2024 bulk sender guidelines require every domain sending 5,000+ daily messages to Gmail to authenticate with SPF, DKIM, and DMARC. Learn exactly what to fix, when enforcement kicks in, and how to test compliance.
Advanced 15 min
How Can I Use An SPF Checker To Troubleshoot Email Delivery Issues After Changing Mail Providers?
Use an SPF checker to fetch your current SPF record, validate syntax, confirm the new provider’s include and IPs, simulate sending IPs for pass/fail.
Intermediate 9 min
How to Configure Cvent with DKIM (and Why SPF Isn’t Enough)
In today’s email environment, ensuring that messages sent from your organization actually reach recipients — and are seen as legitimate.
Intermediate 20 min
How can I interpret the results of an SPF record check to understand pass, fail, softfail, and permerror?
An SPF check result interprets as follows: an SPF “pass” means the sending host is authorized by the domain’s policy.
Advanced 18 min
How Can I Use An SPF Lookup Tool To Count DNS Lookups And Reduce Them Under The 10-Lookup Limit?
Use an SPF lookup tool to recursively expand your SPF record, count every DNS‑querying mechanism and modifier—specifically include, a, mx, ptr, exists.
Foundational 9 min
Why Authenticate Your Emails with Constant Contact?
When you send emails through Constant Contact using your own domain, you want to make sure those emails actually reach your recipients’ inbox.
Advanced 16 min
Is There An SPF Flattener That Supports Per-Sender Rate Limiting Or Change Windows To Avoid DNS Thrashing?
Yes—“per-sender rate limiting” for SPF flattening is not a common, publicly advertised feature; a few platforms support scheduled publishing or change windows.
Intermediate 9 min
How to Properly Configure SPF & DKIM for Your ESP — A Guide by AutoSPF
In today’s world, email remains the backbone of communication for businesses — marketing announcements, customer notifications, transactional receipts.
Advanced 12 min
How can I test an SPF flattener's compatibility with DMARC and DKIM?
To test an SPF flattener’s compatibility with DMARC and DKIM, first publish the flattened SPF in a non-authoritative “shadow” label.
Advanced 13 min
How can I safely flatten SPF records while preserving SPF validation?
You can safely flatten SPF records while preserving SPF validation by recursively expanding includes/redirects into explicit ip4/ip6 mechanisms within the.
Foundational 8 min
AWeber SPF & DKIM Setup — A Guide by AutoSPF
In the world of email marketing, ensuring your emails actually reach your subscribers’ inboxes (and not their spam folders) is often more about what’s behind.
Advanced 10 min
AutoSPF’s Guide to Configuring SPF & DKIM for Avanan: A Detailed Walk-through
As AutoSPF, my mission is simple: to help you lock down your email infrastructure so your domain only sends legitimate mail, and to make spam, impersonation.
Foundational 8 min
What does 'queued email' mean, and how can you fix it?
We’ve all hit that moment where an email just sits there and refuses to leave, and suddenly you’re refreshing your inbox like it’s a magic trick.
Intermediate 9 min
Setting Up SPF & DKIM for Amazon SES
In today’s email-driven world, ensuring your messages reliably reach the inbox — and aren’t flagged as spam or spoofed — is mission-critical.
Intermediate 10 min
How to Configure SPF & DKIM for AFAS Online – A Guide by AutoSPF
In today’s email-delivery landscape, ensuring that your outgoing mail is properly authenticated is essential—not just for deliverability.
Intermediate 5 min
What happens when you don’t comply with Gmail’s new enforcement laws?
Major Email Service Providers like Gmail now recognize that securing your email infrastructure is no longer optional.
Intermediate 15 min
A Complete Guide To SPF Record Types: 6 Variations Explained Simply
Sender Policy Framework (SPF) plays a critical role in email authentication and improving email deliverability.
Foundational 17 min
10 Reasons The SPF Standard Is Essential For Protecting Your Domain
The Sender Policy Framework (SPF) has emerged as an indispensable component of modern email authentication.
Intermediate 5 min
The 12.4 billion shield for your email communications: Why DMARC software is the unsung hero in the war against phishing actors!
Email communications are an integral part of the modern business ecosystem.
Foundational 17 min
Why Every Domain Owner Should Maintain A Valid SPF Record
An SPF record (Sender Policy Framework) is a crucial piece of your domain’s DNS settings that defines which mail servers are authorized to send email on behalf.
Intermediate 17 min
How the SPF Record Character Limit Affects Your Email Authentication
Sender Policy Framework (SPF) is a cornerstone email authentication protocol designed to combat email spoofing and enhance email security.
Advanced 16 min
Top Ways To Resolve Too Many SPF Lookups Without Breaking Authentication
The Sender Policy Framework (SPF) is a critical email authentication technology designed to detect and prevent email spoofing—an often exploited mechanism by.
Intermediate 6 min
The after-effects of SPF misalignments that you should know about
Implementing SPF is basically listing all the addresses and sources that send email on your behalf.
Foundational 14 min
Why You Should Setup SPF Record to Protect Your Domain Reputation
An SPF record, or Sender Policy Framework record, is a critical DNS record designed to prevent email spoofing and improve email authentication.
Intermediate 7 min
Can SPF stop DNS spoofing? Here is what you need to know
Per RFC 7208, SPF evaluation is capped at 10 DNS mechanism lookups and 2 void lookups per check.
Intermediate 15 min
SPF Sendgrid Configuration Guide: Ensure Your Emails Pass Authentication
To authenticate email sent via SendGrid, add include:sendgrid.net to your SPF record and configure SendGrid's domain authentication CNAMEs (two for DKIM, one for the return-path). The sendgrid.net include consumes 5 of your 10 available DNS lookups.
Foundational 3 min
What is a TXT SPF record and why is it important?
Per RFC 7208, SPF evaluation is capped at 10 DNS mechanism lookups and 2 void lookups per check.
Foundational 16 min
Step-By-Step Guide To Checking SPF Records With Mx Tool SPF
Sender Policy Framework (SPF) is a critical email authentication protocol designed to prevent email spoofing and enhance email security.
Foundational 17 min
SPF Record Settings Explained: Protect Your Domain From Spoofing
An SPF record, short for Sender Policy Framework record, is a specialized DNS record configured within the domain name system to help prevent unauthorized use.
Intermediate 16 min
TXT SPF Multiple Include Explained: Simplifying Complex SPF Records
The Sender Policy Framework (SPF) is a vital component of email security and email authentication.
Advanced 16 min
Mastering SPF Syntax Multiple Include: Tips For Managing Complex Spf Records
Sender Policy Framework (SPF) is a critical email authentication protocol designed to prevent email spoofing by specifying which mail servers are authorized to.
Intermediate 4 min
Setting SPF, DKIM, and DMARC for Loops.so
DMARC (RFC 7489) ties SPF and DKIM together by requiring alignment between the envelope sender and the visible From header.
Foundational 16 min
SPF Protocol Explained: Boosting Your Email Deliverability And Security
Email authentication is a critical component of modern email security frameworks designed to verify the legitimacy of the sender and prevent email fraud.
Intermediate 15 min
How To Set Up An SPF Record For Subdomain: A Complete Guide
The Sender Policy Framework (SPF) is a critical email authentication protocol designed to combat email spoofing and enhance email security.
Intermediate 14 min
Understanding SPF Sender Invalid Errors In Email Authentication
Sender Policy Framework (SPF) is a vital component of modern email security, designed to help protect organizations against email spoofing and phishing attacks.
Intermediate 6 min
Top five email-based cyberattacks that besieged inboxes in 2025
Email authentication directly impacts deliverability: Google and Yahoo's February 2024 bulk sender requirements enforce SPF + DKIM + DMARC as hard.
Intermediate 16 min
SPF Record Testing Tool Explained: Ensure Your Emails Pass Authentication
What Is SPF Records: What Are They and Why They Matter?
Intermediate 5 min
Cybersecurity Awareness Month: How to identify and avoid sophisticated phishing scams in 2025
"Domain spoofing is trivially easy without SPF," says Brad Slavin, CEO of DuoCircle. "Anyone can send email that looks like it comes from your domain.
Intermediate 17 min
Combine SPF Records Correctly To Avoid “Too Many DNS Lookups” Errors
A domain can only have one SPF TXT record. Multiple records cause a PermError and break authentication entirely. Learn how to correctly merge multiple SPF records into one and stay under RFC 7208's 10-DNS-lookup limit.
Advanced 5 min
How are companies across the world losing millions to email spoofing?
According to the FBI's 2022 Internet Crime Report (IC3), 300,497 US-based victims reported phishing incidents in a single year.
Intermediate 15 min
SPF Wizard Explained: Create Perfect Spf Records In Minutes
What is SPF and Why It Matters for Email Security The sender policy framework (SPF) is a cornerstone of modern email authentication protocols that protect.
Intermediate 14 min
Secure Your Outgoing Emails With A Trusted SPF DNS Checker
Understanding SPF: What is Sender Policy Framework?
Intermediate 16 min
Why Businesses Should Switch To Dynamic SPF For Email Security
What Is SPF: A Primer on Sender Policy Framework?
Intermediate 6 min
What is the SPF neutral mechanism (?all) and when do you use it?
When an email arrives at the receiver’s end, their server checks the SPF record to see if the sending address’s IP matches one of the authorized sources.
Foundational 14 min
DNS SPF Record Example Explained: Protect Your Domain from Spoofing
What Is DNS: The Foundation of Domain Name System?
Intermediate 14 min
Verify SPF Records To Strengthen Your Email Authentication Setup
Understanding SPF: What is Sender Policy Framework?
Intermediate 9 min
Resolving common errors in an SPF record
An SPF record can do more harm than good if it’s misconfigured. By misconfiguration, we mean missing entries, incorrect use of syntax, typos, and whatnot.
Intermediate 14 min
Why You Should Merge SPF Records To Avoid Email Failures
Understanding SPF Records: A Basic Overview The Sender Policy Framework (SPF) is a fundamental component of email authentication designed to prevent email
Foundational 16 min
Why You Should Add SPF Record To Domain And Prevent Email Spoofing
What is an SPF Record? Explanation and Basics A Sender Policy Framework (SPF) record is a type of DNS TXT record used in the Domain Name System (DNS) that
Intermediate 5 min
SPF misconfigurations banks must avoid to stay secure
While many industries have progressed with zero-trust architectures and multi-factor authentication.
Intermediate 9 min
How to clean up your SPF record to avoid email delivery nightmares?
Over time, entries in an SPF record start piling up as new SaaS tools get added, old services get abandoned without clearing up.
Foundational 14 min
Secure Your Business Email: Configure SPF Record The Right Way
What Is Importance of Email Security for Businesses?
Intermediate 15 min
Spf All Syntax Explained: Best Practices For Domain Protection
Understanding SPF Records: An Overview The Sender Policy Framework (SPF) is an essential component in modern email authentication, designed to combat email
Intermediate 16 min
SPF Limitations Explained: Common Pitfalls And How To Overcome Them
What Is SPF: What It Is and How It Works?
Intermediate 6 min
How do SPF and DMARC work together to enhance email security?
Email channels were never considered a safe means of communication, and with the growing sophistication of artificial intelligence and machine learning.
Intermediate 16 min
How To Check SPF Record Syntax To Improve Email Deliverability
"Email deliverability starts with authentication," says Brad Slavin, CEO of DuoCircle.
Intermediate 6 min
New email authentication requirement by Laposte.net is out- What CISOs and marketing teams should know
The three core email authentication standards — SPF (RFC 7208), DKIM (RFC 6376), and DMARC (RFC 7489).
Foundational 16 min
Why The Correct SPF Record Name Matters For DMARC And Email Deliverability
What Is SPF Records: Definition and Purpose?
Foundational 6 min
Avoid Cyber Threats: A Guide to Safe Email Practices in College
Email is at the center of student life. Whether you’re submitting assignments, applying for internships, or staying in touch with professors, your inbox ho
Intermediate 5 min
SPF records and DNS: How to add them the right way
From the outside, email delivery might seem pretty straightforward—simply type, send, and done! But what goes on behind the scenes is totally different.
Intermediate 16 min
How To Test Email SPF And Fix Common Configuration Errors
Understanding SPF: What Is Sender Policy Framework?
Intermediate 15 min
How To Configure A Network Solutions SPF Record For Email Security
What Is SPF Records and Their Importance?
Intermediate 5 min
How to maintain an SPF record after setup?
Once you create an SPF record and publish it on your domain’s DNS, your job is not done.
Foundational 15 min
What Is SPF Hosting And Why Your Domain Needs It
What Is Basics of SPF (Sender Policy Framework)?
Foundational 14 min
How To Create And Check Your Domain SPF Record Online Easily
A Sender Policy Framework (SPF) record is a specific type of DNS record designed to enhance email authentication by defining which mail servers are authorized.
uncategorized 7 min
Automation + Machine Learning for Continuous Vendor Email Security Assessment
VEC (Vendor Email Compromise) attacks are increasing at an alarming rate.
Foundational 14 min
Common SPF Record Problems And How You Can Fix Them Today
The five most common SPF record problems are multiple records on the same domain, exceeding the 10-DNS-lookup limit, syntax errors, exceeding the 255-character TXT string limit, and choosing the wrong qualifier. Each has a specific, RFC-compliant fix.
Foundational 13 min
Understanding SPF Spam Protection: How Sender Policy Framework Secures Your Email
Introduction to Email Spam and Its Impact Email remains an indispensable communication tool in both personal and business contexts, yet it is also a prime
Intermediate 5 min
Setting up SPF and DKIM records in GoDaddy
Setting up SPF and DKIM records in GoDaddy is one of the essential steps on your email security checklist.
Foundational 15 min
How To Use Spf Format Checker For Accurate Email Authentication
What Is SPF and Its Role in Email Authentication?
Foundational 6 min
How can legal firms protect their outgoing emails with SPF?
In the legal circles, even a single mark on your reputation can cause significant damage to your practice and your firm’s identity.
Foundational 10 min
What Is An SPF Record And How Does It Protect Your Email Domain?
An SPF record is a DNS TXT record that tells receiving mail servers which IP addresses and servers are authorized to send email for a domain. Learn how SPF protects against email spoofing, the exact structure of a record, and how to verify one is published correctly.
Advanced 7 min
Optimizing SPF for startups using multiple email service providers
The growing technical stack, which includes transactional emails, marketing automation, and sales outreach tools.
Foundational 12 min
SPF Validation Tools: The Best Online Checkers for Your Domain
One of the top contenders in the field of SPF validation is MXToolbox. It stands out due to its intuitive interface and an array of diagnostic capabilities.
Intermediate 7 min
How can influencers use SPF to protect their personal brand emails?
There is a common misconception that email security is only meant for large organizations or, at most, mid-sized startups.
Intermediate 11 min
SPF Record Softfail: How to Configure and Fix Issues
Sender Policy Framework (SPF) records serve as a gatekeeper in the realm of email communication.
Foundational 12 min
SPF Record Explained: Understanding Email Authentication for Your Domain
At its essence, an SPF record, or Sender Policy Framework record, acts as a gatekeeper for your email.
Intermediate 6 min
Using SPF hardfail for non email sending domains: A Guide
Having more than one domain registered under your organization’s name is not uncommon, but their security seriously is.
Foundational 13 min
How To Create An SPF Record For My Domain: A Step-By-Step Guide
When you send an email, do you ever stop to think about how many things can go wrong before it reaches the recipient?
Advanced 5 min
AI Data Collection at Scale: Why Most Teams Choose Managed Proxy Services Over Servers
If you’re building AI systems that rely on large-scale data collection, chances are you’ve hit the proxy dilemma.
Foundational 13 min
SPF TXT Record Generator: Create Your Email Authentication Records Easily
Email communication has become a key part of our everyday lives, whether we’re connecting with friends, collaborating with coworkers.
Advanced 4 min
How do cybercriminals use neglected domains to evade SPF and DMARC protections?
Cybersecurity experts are lately highlighting the degree to which threat actors have gone in abusing security protocols.
Foundational 18 min
What Is SPF Email? A Guide to Sender Validation Technology
In our increasingly connected digital world, ensuring that your emails are genuine and trustworthy is more important than ever.
Foundational 14 min
IP Address Generator: Create Random IP Addresses for Free
In a digital landscape where every click can reveal your location or personal information, protecting your privacy is more important than ever.
Foundational 19 min
IP Lookup: Discover Your IP Address Location and Details
In today’s digital landscape, your IP address is more than just a line of numbers; it’s like a digital identity that reveals where you are and who you’re with.
Intermediate 5 min
The ‘unsubscribe’ button is a new security risk; consider a different approach
We are often told to simply ‘unsubscribe’ from newsletters, shopping emails, and similar lists, as it shrinks our digital footprint, prevents soft spam.
Intermediate 13 min
How DKIM Works: A Comprehensive Guide to Email Authentication
In an age where our inboxes overflow with messages, ensuring that these communications are safe and genuine is more important than ever.
Intermediate 13 min
DKIM Authentication: A Complete Guide to Secure Email Deliverability
In the digital age, where nearly everyone relies on email for communication.
Intermediate 9 min
Common SPF Record errors (and how to fix them): Null values, multiple includes, and network solutions issues explained
The three most common SPF errors are multiple records on the same domain (PermError), null values from broken include chains (counted as void lookups), and Network Solutions DNS panels stripping quotes from TXT values. Each has a specific RFC-compliant fix.
Foundational 5 min
What does the ‘null’ value mean in an SPF record?
Imagine setting up an SPF record to protect your domain, only to realize it’s as good as not having one!
Intermediate 13 min
SPF for Subdomain: A Complete Guide to Configuration and Security
Each subdomain that sends email needs its own SPF TXT record — subdomains do NOT inherit SPF from the parent domain. Learn how to configure, test, and maintain SPF records for subdomains like mail.example.com, sales.example.com, and support.example.com.
Intermediate 5 min
How to safeguard your business against Vendor Email Compromise (VEC)?
Vendor Email Compromise (VEC) or financial supply chain compromise is a type of threat attack where cybercrooks spoof or impersonate the email account of a.
Advanced 14 min
SPF Compression: A Comprehensive Guide to Benefits and Techniques
SPF Compression and Its Role in Email SPF compression is more than just a technical buzzword; it’s an essential practice that enhances the functionality of.
Intermediate 5 min
The New Zealand government’s new DMARC requirements for email security
The New Zealand government recently published its Secure Government Email (SGE) framework.
Advanced 12 min
Multiple SPF Records: Essential Configuration for Email Authentication
Can You Have Multiple SPF Records? The crux of the matter is that you cannot have multiple SPF records for a single domain.
Intermediate 6 min
How often should you audit your SPF record, and what should you look for?
An SPF record is the primary authorization layer that determines whether your SPF configuration will be effective or let any domain send emails on your behalf.
Foundational 6 min
Understanding SPF mechanisms: a, mx, ip4, and include
SPF has 8 mechanisms defined in RFC 7208: all, include, a, mx, ptr, ip4, ip6, and exists. The four most common are ip4 (authorize a specific IP), a (authorize the domain's A record), mx (authorize the domain's MX records), and include (delegate to another SPF record). Learn the exact semantics and lookup cost of each.
Intermediate 18 min
SPF Syntax: Understanding SPF Records for Email Configuration
When you think about emailing, it’s easy to overlook the behind-the-scenes work that keeps those messages flowing smoothly.
Intermediate 13 min
Mimecast SPF: Setup Guide for Effective Email Protection
In a time where our inboxes overflow with messages, not all of them are as innocent as they seem.
Foundational 3 min
A simple explanation of DMARC compliance laws
"The most misunderstood thing about DMARC is that SPF passing is not enough — the domains have to align," says Brad Slavin, CEO of DuoCircle.
Intermediate 7 min
Why SPF alignment matters in DMARC enforcement?
As per a report, more than 90% of the world’s top 1.8 million email domains are still at risk of spoofing attacks because only 7.
Intermediate 14 min
Proofpoint SPF Record: The Essential Email Security Configuration Guide
In a world where email is the primary mode of communication for businesses and individuals alike.
Foundational 12 min
How to Check SPF Record on MXToolbox for Email Validation
In the world of email communication, getting your messages to land in inboxes instead of spam folders is crucial.
Advanced 5 min
How to utilize DMARC reports to resolve SPF errors?
The SPF protocol works efficiently only when your domain’s SPF record doesn’t have even a minor error.
Advanced 7 min
Invisible SPF failures: How misconfigured DNS entries are costing enterprises millions!
There’s a common misconception among domain owners when it comes to email authentication protocols— we have configured SPF, DKIM, and DMARC.
Intermediate 6 min
6 Best practices for maintaining an SPF record
Threat actors seek ways to impersonate credible companies and their representatives to send phishing emails on their behalf.
Intermediate 5 min
How to fix “550; 5.7.15 Access Denied” rejections?
Microsoft has always prioritized email security, and in pursuit of this goal, it mandated that all bulk senders properly authenticate their messages.
Intermediate 5 min
DMARC and anti-spam aren’t the same!
With around 3.4 billion spam emails sent daily, securing inboxes has become more challenging than ever.
Foundational 4 min
What happens if your SPF record is broken?
Sender Policy Framework (SPF) is the foundation of your email security setup, and if SPF is not configured properly.
Intermediate 6 min
Optimizing Email Deliverability: Strategies for Success
Your carefully crafted marketing campaign just launched, complete with compelling subject lines and perfectly timed send schedules.
Intermediate 3 min
3 points to consider before setting your SPF record to -all (HardFail)
Email security is on everyone’s radar—companies are closing every gap for threat actors to come in and exploit their email sending sources.
Intermediate 5 min
Understanding the relevance of Sender Policy Framework (SPF) in 2025
Sender Policy Framework (SPF) is an email authentication protocol designed to prevent email spoofing — a common tactic in spam and phishing attacks.
Intermediate 15 min
Kitterman SPF Check: A Comprehensive Guide to Performance Analysis
In the digital landscape, email is still one of the primary ways we communicate, whether for business proposals or casual chats.
Intermediate 15 min
KnowBe4 SPF Record: How to Set Up for Maximum Email Security
In an age where email remains a primary communication tool for businesses, the dangers lurking in our inboxes are more real than ever.
Intermediate 5 min
BEC and FTF scams are leading to a steep rise in cyber insurance claims!
As per the recent Coalition 2025 Cyber Claims Report, business email compromise-based attacks (BEC) and fund transfer frauds (FTF) have led to a steep surge in.
Foundational 16 min
DreamHost SPF Record: A Step-by-Step Email Setup Guide
Setting up your email correctly is essential if you want to ensure that your messages get delivered without a hitch.
Foundational 7 min
What is an executive phishing attack and how to prevent it?
Threat actors try different tactics to intercept and steal data, which is further exploited for financial gain. One such tactic is an executive phishing attack.
Advanced 5 min
The healthcare industry is the most sought-after by cybercriminals
The healthcare industry depends a lot on technology — whether it’s online appointments, digital health records, or connected medical devices.
Intermediate 16 min
Office 365 SPF Record: Complete Guide to Email Configuration
In the digital age, managing your email communications effectively has become more important than ever.
Intermediate 5 min
Fixing typical SPF errors
SPF prevents spoofing by ensuring that only trusted sources can send emails using your domain. But for it to work well, the SPF record must be error-free.
Intermediate 16 min
WPEngine SPF Record: Complete Guide to Proper Email Setup
Email may seem like a simple tool for communication, but behind the scenes, it’s a battleground for security and credibility.
Advanced 6 min
Does SPF play a significant role in BIMI and VMC?
No doubt that placing your logo beside every email you send makes your brand stand out in a crowded inbox and boosts engagement.
Foundational 13 min
Mailchimp SPF Record Setup: Ensure Your Email Deliverability
Setting up your email system can often feel like tackling a giant puzzle—each piece needs to fit just right for everything to work smoothly.
Intermediate 4 min
What are dangling SPF records and why are they a threat to email security?
SPF records are highly sensitive— even a minor change can invalidate them or trigger an error, resulting in improper email authentication.
Intermediate 13 min
Google SPF Record: Complete Guide for Proper Email Configuration
To authenticate email from Google Workspace (formerly G Suite), publish a single SPF TXT record at your apex domain containing include:_spf.google.com followed by any other authorized senders and a qualifier. The Google include resolves to Google's current sending IP ranges automatically.
Advanced 5 min
Flattening SPF records: Why is it worth the effort?
"The misconception about SPF flattening is that it's a one-time fix," says Adam Lundrigan, CTO of DuoCircle and architect of AutoSPF's flattening engine.
Intermediate 15 min
Zix SPF Record: A Complete Guide to Configuration and Setup
To authenticate email sent through Zix (now part of OpenText Cybersecurity), add the Zix-provided include mechanism to your SPF record. The exact include string varies by product tier (ZixEncrypt, ZixProtect, ZixMail). Learn the exact syntax and how to combine with existing senders.
Advanced 5 min
SPF and multi-tenant email service providers: a collision course?
During the 2024 Black Friday to Cyber Monday (BFCM) period, Mailchimp customers sent billions of emails.
Advanced 6 min
SPF DNS lookup limits: exploits, mitigations, and best practices
"From an engineering perspective, the 10-lookup limit is a resource protection mechanism, not a security feature," says Adam Lundrigan, CTO of DuoCircle.
Intermediate 5 min
Efficient DMARC tools are needed after the UK NCSC changes
DMARC (RFC 7489) ties SPF and DKIM together by requiring alignment between the envelope sender and the visible From header.
Intermediate 18 min
SPF Records in DNS: A Complete Guide for Email Security
An SPF record is a DNS TXT record at the domain apex that declares which IP addresses and servers are authorized to send email for that domain. Learn how SPF records are published, how receiving servers evaluate them during SMTP, and how to avoid the most common DNS-level configuration mistakes.
Foundational 8 min
Are no-reply emails safe? Understanding the security risks of these emails
If you regularly send out marketing emails for your business, you probably know what kind of emails we’re talking about.
Foundational 17 min
SPF Records for Email: Essential Authentication Setup for Your Domain
SPF records, or Sender Policy Framework records, are essential components of email authentication that allow domain owners to specify which IP addresses are.
Intermediate 17 min
Brevo SPF Record: A Complete Guide to Optimize Email Deliverability
A Brevo SPF (Sender Policy Framework) record is essential for ensuring that emails sent from your domain are properly authenticated, improving deliverability.
Advanced 6 min
Shadow admins: How do you uncover the mask of these stealthy accounts?
Most organizations have strict norms and regulations on what resources their employees can access— like which systems are open to all.
Advanced 6 min
The right way to transition to SPF HardFail (-all)
Sender Policy Framework, or SPF, is a simple way to tell the receiving servers which IPs or mail servers are allowed to send emails on behalf of your domain.
Foundational 17 min
Free SPF Flattening Tool: Download the Best Software for Your Needs
There are several free tools available for SPF flattening, including cfspf, which is tailored for users of Cloudflare, and DMARCDuty.
Intermediate 5 min
Multiple SPF records open avenues for phishing
If your SPF is not working efficiently, chances are that your domain is linked with multiple SPF records.
Foundational 17 min
What Is SPF Alignment? Understanding Email Security Protocols
SPF alignment is a DMARC concept: for DMARC to pass via SPF, the domain in the Return-Path (envelope sender) must match the domain in the From header. Relaxed alignment (default) allows subdomain matches; strict alignment requires an exact match. SPF can pass while DMARC still fails alignment.
Intermediate 3 min
How does SPF flattening simplify DNS records?
Each SPF record should not have more than 10 DNS lookups; otherwise, validation failures are triggered.
Intermediate 6 min
Why is IoT email authentication a hot topic?
These days, IoT (Internet of Things) devices are everywhere.
Foundational 16 min
How to Check SPF Record for Domain: Verify Your DNS Settings
You can check the SPF record for your domain by using various online tools, such as MXToolbox or Kitterman’s SPF Record Validator.
Intermediate 6 min
Broken SPF record- What does it mean and how to fix it!
Sender Policy Framework, or SPF, is one of the policies that keeps your email communications safe from malicious attempts of threat actors.
Intermediate 4 min
Managing relaying in application emails
Over the past few years, there has been a significant evolvement in email relay controls, especially in how application-generated emails are handled.
Foundational 12 min
Proofpoint SPF: Essential Guide to Email Security Configuration
To authenticate email sent through Proofpoint Essentials or Proofpoint Email Protection, add the Proofpoint-provided include to your SPF record. The exact include varies by Proofpoint tier and region; copy it from the Proofpoint admin console. Proofpoint typically sits in front of Microsoft 365, which affects the 10-DNS-lookup budget.
Intermediate 11 min
How to Create Your Amazon SES SPF Record: Essential Configuration Steps
How to Set Up Amazon SES SPF Record Setting up a custom MAIL FROM domain is the cornerstone of configuring your SPF record for Amazon SES.
Intermediate 13 min
SPF Record for Google: A Complete Guide to DNS Configuration
An SPF record, or Sender Policy Framework record, is a crucial component of your domain’s DNS (Domain Name System) settings that specifies which mail servers.
Intermediate 13 min
KnowBe4 SPF: The Key to Email Protection Against Phishing
At its core, Sender Policy Framework (SPF) serves as a defense mechanism against email spoofing, a common tactic used in phishing attacks.
Intermediate 16 min
SPF (Sender Policy Framework) Tester: Check Your Email Sender Configuration
In a digital age where our inboxes can quickly become a battlefield against spam and phishing attempts.
Advanced 3 min
Gmail, Outlook, and Apple Mail warn users ahead of anticipated AI menaces in 2025
Gone are the days when incorrect grammar, poor graphics, an unprofessional tone, and other flaws were red flags of a phishing email.
Intermediate 16 min
Kitterman SPF Check: A Comprehensive Guide to Accurate Analysis
Email is a major part of our daily communication, yet many people overlook the importance of securing it.
Intermediate 14 min
Office 365 SPF Record: Essential Configuration Steps for Email Protection
Email has become a lifeline for communication, both in our personal lives and in the world of business.
Intermediate 5 min
Do even ESPs get SPF wrong? Here’s what you should know
Email security is a two-way street, which means both the client and the email service provider are responsible for maintaining the legitimacy and authenticity.
Intermediate 16 min
Google SPF Record: A Complete Guide to Setup for Your Domain
In the digital age, sending emails is as routine as breathing, but did you know that simply hitting “send” doesn’t guarantee your message will land where you.
Foundational 12 min
Generate SPF TXT Records: The Ultimate Tool for Your Domain
When you send an email, have you ever wondered if it lands in the recipient’s inbox rather than their spam folder? That’s where SPF records come in!
Advanced 5 min
Cyber resilience 2025- a bigger picture of technical agility and adaption for businesses
In general, cyber resilience is a company’s ability to withstand, respond to, and recover from cyberattacks or IT failures while continuing to operate smoothly.
Foundational 4 min
What is a DNS TXT record?
You may already know that SPF records are TXT-type DNS records that domain owners create to mention SPF policies and enlist the mail servers they authorize to.
Foundational 5 min
How long do SPF and DMARC records take to propagate across the internet?
Once you are done with creating SPF and DMARC records to safeguard your email communications.
Intermediate 5 min
Reducing DNS lookups using SPF flattening
In SPF, a DNS lookup is the process using which the receiving mail server fetches the SPF TXT record of the sender’s domain.
Advanced 4 min
SPF record +all mechanism- why is it the most dangerous SPF setting
SPF prevents emails sent by unauthorized people from landing in the inboxes of targeted recipients.
Foundational 8 min
Email security protocols that must be a part of your security strategy
We know that email is one of the most crucial aspects of your business communication, but we hate to break it to you; it’s also the most vulnerable one.
Foundational 5 min
Why SPF prevailed among other email security solutions?
Back in the days when SMTP (Simple Mail Transfer Protocol) was designed, it lacked any authentication techniques.
Intermediate 6 min
Why does DKIM fail? What can you do about it?
Has it ever happened to you that you sent an email, but it never reached the recipient despite doing everything right?
Intermediate 3 min
Yahoo Japan made it mandatory to have DMARC
Email security has seen many developments over the years.
Intermediate 4 min
SPF soft fail and SPF hard fail; what are these, and which one is right for your domain?
You would be surprised to know that as many as 3.
Intermediate 3 min
Why do legitimate emails fail SPF checks sometimes?
It’s common for legitimate emails to be falsely marked as spam or rejected because they failed the SPF verificationchecks.
Advanced 4 min
Pros and cons of using wildcarding in SPF
SPF is the email authentication protocol that allows domain owners to specify which mail servers they officially allow to be used to send emails on behalf of a.
Intermediate 6 min
Your SPF record is broken- What does it mean and how do you fix it?
A broken SPF record means there is some issue in it; either it’s misconfigured, incomplete, or exceeds the technical limits.
Intermediate 4 min
SPF format explanation- Basic and advanced
An SPF record includes the servers and IP ranges a domain owner allows to be used to send emails on behalf of their brand.
Intermediate 3 min
Email security standards for SPF in RFC 5322
RFC 5322 includes the syntax for Internet email headers. This means it does not say anything directly about how SPF should be configured and maintained.
Intermediate 6 min
Implementing DMARC is the right way to gain visibility and maintain GDPR compliance
GDPR (General Data Protection Regulation) is the European compliance that came into effect in 2018.
Intermediate 5 min
Merging multiple SPF records into one to avoid the PermError
Having multiple SPF records for a domain results in the PermError.
Advanced 4 min
How does Privileged Account and Session Management (PASM) help strengthen DMARC and email security?
The truth is that the most important people in your organization are also the most targeted individuals for cyber-attacks due to their access to the most.
Intermediate 3 min
Understanding the concept of wildcarding in Sender Policy Framework
SPF does not support DNS wildcards the way you might expect. Per RFC 7208, each subdomain that sends email must have its own explicit SPF TXT record — a wildcard DNS entry does NOT create a wildcard SPF record. Learn the exact semantics and safe alternatives.
Intermediate 9 min
Everything you should know about setting up BIMI for your domain
A typical user receives multiple emails a day, some of which are essential updates or personal messages, while others are marketing emails from various brands.
Advanced 5 min
Everything you should know about typosquatting and how to stay protected
They say familiarity is deceptive, and we absolutely agree with it, especially in the context of cybersecurity.
Advanced 3 min
What should you do if your SPF record has exceeded the limit of 255 characters?
If you have just started with SPF implementation for your domain, your SPF record can run into multiple technical issues since there are many limitations and.
Intermediate 8 min
What are BreakSPF attacks and how can you defend against them?
In today’s digital age, email is the most commonly used mode of communication. It is simple and quick, which is its greatest strength and biggest vulnerability.
Intermediate 5 min
Stay cyber vigilant this Black Friday
Black Friday sales are the perfect breeding ground for threat actors lurking to exploit excited shoppers.
Intermediate 5 min
How to update an SPF record for added senders?
Creating an SPF record is a one-time job, but you have to keep updating it with new senders.
Intermediate 3 min
5 key contributors to the development of the Sender Policy Framework
“None of us is as smart as all of us.” — Ken Blanchard Sender Policy Framework (SPF) is an email authentication protocol created in the late 1990s that is
Intermediate 5 min
SPF Soft fail and hard fail in email marketing
As of August 13, 2024, the United States is the world’s largest sender of spam emails, with as many as 8 billion of them sent daily.
Intermediate 6 min
Decoding SPF mechanisms and their role in maximizing email deliverability
In today’s email ecosystem, security and deliverability must go hand-in-hand.
Intermediate 5 min
Troubleshooting the common SPF authentication issues for the best email deliverability
If your SPF record has any errors and you don’t fix them soon, then recipients’ mailboxes start marking your emails as spam or rejecting them outright.
Advanced 3 min
Resolving custom domain configuration issues for Azure Email Communication
It’s important to properly configure your domains so that email deliverability is not hampered.
Foundational 6 min
Revisiting the basics of SPF, DKIM, and DMARC in 2024
Be it corporate entities or business enterprises, emails tend to be one of the strongest modes of communication for conveying professional messages.
Advanced 3 min
Impersonation is the leading phishing strategy of 2024
A famous software firm, Egress, published its Phishing Threat Trends Report in October 2024.
Advanced 4 min
The future of SPF flattening; trends and emerging practices
SPF flattening prevents your SPF record from exceeding the maximum lookup limit and becoming invalid.
Intermediate 5 min
Invalid DKIM signature error: Here’s how you can fix it
To thrive in today’s digital world laden with cybersecurity threats, you must implement certain measures to tighten your security.
Intermediate 9 min
Difference between email cybersecurity and email authentication
Businesses with an online presence need robust measures to protect their authenticity and identity.
Intermediate 3 min
Setting SPF, DKIM, and DMARC for Omnisend
If you send emails using the Omnisend platform and still don’t have SPF, DKIM, and DMARC in place, then your emails can get blocked.
Advanced 6 min
8 cybersecurity trends that will redefine the digital landscape in 2024
The ever-evolving digital landscape is bringing both solace and trouble to people. Cyber advancement has made both our professional and personal lives easy.
Intermediate 4 min
The role of SPF records in enhancing email security and deliverability
When it comes to upholding the integrity and security of your email communications.
Intermediate 3 min
What are the fallback mechanisms in SPF?
In SPF, fallback mechanisms come into play when an email fails SPF checks, but the recipient’s server or policies offer ways to handle or mitigate the failure.
Advanced 5 min
Automating SPF macro management with scripting and APIs: a step-by-step guide
SPF macros are placeholders used within SPF records.
Intermediate 3 min
Adding your SPF record to your domain provider
To enable SPF for your domain, you need to add a DNS TXT record at your domain provider.
Advanced 4 min
How threat actors managed to send millions of phishing emails from trusted domains- explaining echo-spoofing
In the first half of 2024, a simple toggle in Proofpoint’s email service allowed threat actors to send millions of hard-to-detect emails impersonating.
Intermediate 3 min
Why subdomains should not inherit the SPF policy of the parent domain?
It’s common for businesses to have multiple subdomains, but what about their security?
Foundational 6 min
Spotting spoofed emails with DMARC: A guide
Here’s a harsh truth: spoofing attacks are more frequent and prevalent than you think.
Intermediate 6 min
How to configure SPF to identify valid email sources for Microsoft 365 domains?
SPF, which is short for Sender Policy Framework, is an email authentication protocol that allows Microsoft 365 domain owners to prevent threat actors from.
Foundational 5 min
4 ChatGPT and AI-based scams to be wary of in the second half of 2024
We are more than halfway down in 2024, and the number of AI-based scams is not looking like it’s in the mood for dwindling anytime soon.
Advanced 5 min
SPF for multi-domain environments: challenges and solutions
Most large-scale businesses own multiple domains and subdomains, which are heavily used for sending emails.
Foundational 6 min
Is the Microsoft Account Security Alert email a scam? How to differentiate between a genuine and fake alert email
Have you been receiving security alert emails from Microsoft lately? Well, you are not alone!
Foundational 3 min
Threat actors are exploiting multiple SMTP servers and bypassing SPF, DKIM, and DMARC authentication
Cybersecurity works only if there are no vulnerabilities in the tools and protocols themselves.
Intermediate 3 min
Setting up SPF for Sophos
Sophos is a British security software and hardware company that offers a suite of products.
Foundational 3 min
Does SPF break for forwarded emails and mailing lists?
Yes — SPF breaks for forwarded email and mailing lists because the forwarder's IP is not in the original sender's SPF record. This is a known RFC 7208 limitation and the main reason DKIM, DMARC, ARC (RFC 8617), and SRS exist.
Intermediate 5 min
Are Your SPF and DKIM Identifiers Aligned?
As you know, DMARC is based on SPF and DKIM, and the alignment of both these protocols is crucial for its processing.
Intermediate 4 min
SPF record lookup: A much-needed diagnosis
These days, LLMs, or large language models, are making it easier for threat actors to write convincing phishing emails without leaving suspicious red flags.
Foundational 4 min
Which IP addresses you should not add to your SPF records?
The foremost step of creating an SPF record is enlisting all the IP addresses and mail servers that you want to add to it.
Foundational 8 min
SPF vs DKIM vs DMARC: The Battle of Email Authentication Protocols
You might have heard a lot about email authentication and how implementing protocols like SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail).
Intermediate 3 min
Setting SPF and DKIM for Salesforce
When using an external email sender, like Salesforce, to send emails from addresses within your domain, it’s crucial to set up SPF and DKIM.
Advanced 3 min
Reasons for Code 550 SPF Check Failed Error and How to Fix it?
Domain owners may often come across the ‘550 SPF check failed’ error, which is generally triggered by the absence of a valid SPF record in the domain’s DNS.
Intermediate 4 min
What is the Role and Relevance of SPF Surveys?
SPF or Sender Policy Framework is the first line of defense between your email ecosystem and email-based cyberattacks.
Intermediate 4 min
Difference Between SPF Setup for Small, Medium, and Large Businesses
You have a company? You have a domain? You and your team send emails?
Foundational 4 min
7 Myths and Misconceptions about Sender Policy Framework
Understanding the realities and limitations of the Sender Policy Framework (SPF) is crucial for making informed decisions about your email security.
Advanced 3 min
Setting Up Sender Policy Framework for Amazon SES
Amazon Simple Email Service, or SES, is a cloud-based email-sending service developed for businesses that send marketing, notification.
Foundational 4 min
Background of Scott Kitterman and His Contribution to Sender Policy Framework
Email security was a headache for tech giants (and even some smaller companies) in the late 1990s.
Intermediate 3 min
A Comprehensive Guide to Manually Generating SPF Records for Custom Domains
SPF records, as you may be aware, are like the bouncers of your email servers.
Intermediate 4 min
Qualtrics, Moosend, Shopify, and Other Major Email Service Providers are Emphasizing the Deployment of DMARC
Threat actors look for unprotected emails.
Advanced 8 min
New Update: DMARC to be Mandatory for PCI DSS Compliance by 2025
Here’s a harsh truth- your customers’ card transactions are not as secure as you might think.
Foundational 5 min
Understanding Homoglyphing: The Craft of Deception in Phishing Attacks
Have you ever come across a URL that seems legitimate at first glance, yet there is something fishy about it?
Advanced 4 min
How Does DNS Packet Fragmentation Affect the Sender Policy Framework?
For network administrators, understanding DNS packet fragmentation is crucial.
Intermediate 8 min
How Does SPF Help Marketers in Improving Email Deliverability?
Imagine a situation where all your well-crafted emails land in your audience’s inbox, and they actively engage with them!
Intermediate 3 min
Why the SPF Character Limit Exists and How Can You Stay Within It?
As per RFC 7208, all SPF records should not be more than 255 characters long.
Intermediate 5 min
SPF Flattening vs. SPF Macros: Choosing the Right Approach for Your Organization
Email authentication standards are maturing and now, the SPF protocol also has some new elements to add to its list; we are talking about the SPF flattening.
Advanced 7 min
SPF Best Practices for Protection Against Email Spoofing and Phishing; A Guide for CISOs
Emails are important yet one of the most vulnerable strings of corporate communication.
Foundational 3 min
The UK’s Central Digital and Data Office Solved a Unique Problem with Sender Policy Framework
AutoSPF · The UK’s Central Digital and Data Office Solved a Unique Problem with Sender Policy Framework In 2022.
Intermediate 3 min
How to Fix “550 5.7 0 Email Rejected Per SPF Policy”
The SMTP error '550 5.7.0 Email Rejected Per SPF Policy' means the receiving mail server rejected your message because the sending IP failed SPF authentication. Fix it by adding the sender to the SPF record, correcting syntax errors, or resolving a PermError from multiple records or exceeding 10 DNS lookups.
Foundational 6 min
The Emergence of Sender Policy Framework to Combat Email Phishing
Digitization is both a boon and a bane. With the rapid advancements in the technological sphere, there has been a steep rise in spiteful activities.
Intermediate 5 min
What is Gmail's ‘Best Guess’ SPF Status?
Gmail sometimes guesses the SPF status of senders lacking an SPF record published in their domain’s DNS.
Foundational 6 min
6 Steps to Outplay BEC Attackers
Starting the blog on a good note- the second quarter of 2023 celebrated a record low of only 34% of victims paying off to ransomware attackers.
Intermediate 5 min
How to Set Up SPF and DKIM Records in GoDaddy?
GoDaddy is a popular hosting provider that offers easy-to-follow instructions on adding SPF and DKIM DNS records to stay abreast of phishing and spoofing.
Intermediate 6 min
A Guide to Choosing the Right SPF Flattening Tool for Your Organization
With organizations with complex email infrastructure, implementing SPF (Sender Policy Framework) is no easy feat!
Foundational 4 min
Reasons Behind Discouraging the Use of PTR Mechanism in an SPF Record
Domain owners who care about email delivery and prevention from phishing attacks take no chances when it comes to the validation and correctness of their SPF.
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