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
email security
247 articles
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 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 6 min
Inside RFC 6376: How DKIM Verification Actually Works
A technical walkthrough of how receiving servers verify DKIM signatures under RFC 6376 — from header extraction to canonicalization, body hash, and signature check.
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 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
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.
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 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 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.
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.
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 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 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 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.
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.
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 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.
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.
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.
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 13 min
What Are Common SPF Record Syntax Errors That Cause Emails To Be Marked As Spam?
The most common SPF syntax errors that cause emails to be marked as spam include a missing or malformed “v=spf1” prefix; using commas or other separators.
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.
Advanced 6 min
Mastering DKIM alignment: keys, signatures, and the real reasons emails fail verification
When you send an email, it doesn’t reach the recipient directly; it has to go through a complex journey before it lands in the inbox.
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.
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.
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.
Foundational 6 min
TLS and DKIM explained: Why you need both for strong email security
When you think of email security, what comes to your mind?
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 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.
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 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 5 min
Cybersecurity experts warn against a new phishing tactic hiding in your email subject line!
According to the FBI's 2022 Internet Crime Report (IC3), 300,497 US-based victims reported phishing incidents in a single year.
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 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 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?
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.
Intermediate 4 min
Why Strong Email Security Matters During Busy Academic Seasons
Email has become a central tool for communication in academic institutions.
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.
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?
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.
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
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.
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.
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 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 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 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 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.
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 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.
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 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 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.
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.
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.
Foundational 17 min
Microsoft Security Alert Email: How to Recognize Phishing and Scams
If you receive a Microsoft security alert email, first verify its authenticity by checking that it comes from ‘account-security-noreply@accountprotection.
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 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.
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.
Advanced 4 min
The point where DORA and DMARC intersect
DORA (Digital Operational Resilience Act) is a Europe-based framework explicitly designed to establish regulatory compliance for the finance sector.
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 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 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 4 min
Overly permissive SPF configurations that make your email infrastructure vulnerable to phishing and spoofing
Overly permissive SPF configurations refer to settings that are set so loosely and broadly that anyone on the Internet can send emails from your domain.
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 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 4 min
Understanding the use cases for SPF soft fail and hard fail
SPF works on two core components: soft fail and hard fail. Domain owners should understand the conditions under which each of these mechanisms works perfectly.
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.
Advanced 6 min
Understanding DKIM’s cryptographic algorithms: RS256 vs. RS512 and emerging trends
When it comes to maintaining the integrity of the contents of an email and verifying that they genuinely come from a trusted sender.
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.
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.
Foundational 5 min
Building a strong defense: training your employees for email security
Emails are an integral aspect of any business communication, and we’re sure that your employees send dozens of emails every day.
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 9 min
Understanding quid pro quo attacks and how to avoid falling victim to them
You might have often come across the term quid pro quo, perhaps in the context of legal or business dealings.
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 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.
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.
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.
Advanced 3 min
Configuring SPF, DKIM, and DMARC for Brevo (formerly Sendinblue)
To authenticate email sent through Brevo (formerly Sendinblue), add include:spf.brevo.com to your SPF record, configure Brevo's DKIM CNAME records from the dashboard, and publish a DMARC record. All three are required for full authentication.
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.
Foundational 5 min
Trello data breach results in massive exposure of data on the dark web!
Big and small brands across the globe are falling prey to cyberattacks, and this time, it is Trello– the insanely popular project management tool.
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.
Foundational 3 min
Generative artificial intelligence and machine learning are overcoming the limitations of traditional cybersecurity measures
Threat actors are leveraging the speed and accuracy of artificial intelligence to launch sophisticated, difficult-to-detect cyberattacks.
Advanced 8 min
What is the ‘554 5.7.5’ permanent error in DMARC and how to fix it?
The response from the remote server was: DMARC (RFC 7489) ties SPF and DKIM together by requiring alignment between the envelope sender and the visible From.
Intermediate 6 min
What is ARC (Authenticated Received Chain) and its role in email security?
ARC or Authenticated Received Chain helps overcome the shortfalls of DMARC, further strengthening the overall email security standards.
Advanced 5 min
Troubleshooting the ‘SPF alignment failed’ error for unaffected email authentication and delivery
When you create an SPF record, the most important step you perform is mentioning all the mail servers or IP addresses allowed to send emails as your brand’s.
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 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.
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.
Advanced 6 min
How is Sender Policy Framework (SPF) Delegation Done?
SPF delegation is a one-time setup where a domain owner gives control of their SPF record to an external email server or a third-party service to send emails.
Foundational 4 min
New Update: Microsoft Joins Forces for Stronger Email Authentication
It was not long ago when Google and Yahoo revamped their email-sending policies and made DMARC authentication a mandatory exercise for organizations sending.
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.
Intermediate 5 min
How Does the CIDR Notation Error Affect SPF?
All the IP addresses that you officially allow to be used for sending emails on your behalf are listed in an SPF record.
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.
Intermediate 5 min
Sender Policy Framework Risk Exposures in 2024
Sender Policy Framework is an email authentication protocol that allows a domain owner to publish an SPF record corresponding to their name.
Foundational 5 min
The Role and Relevance of DNS SPF Records for Email Authentication
Email authentication, a crucial practice in today’s digital world, is the process of verifying the true identity of an email sender.
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.
Advanced 5 min
What is an SPF Record Flattener and Why Should you Consider Using it for Your Domain?
If your domain is already protected with the Sender Policy Framework (SPF) and you regularly update and monitor your SPF records.
Intermediate 3 min
Why Sender Policy Framework (SPF) Has a Lookup Limit of 10?
SPF helps recipients’ mailboxes verify the authenticity of senders’ domains by referring to their predefined policies.
Intermediate 6 min
10 Reasons Why DIY-ing SPF isn’t a Good Choice for Companies
Are you also tempted to take care of the Sender Policy Framework (SPF) on your own?
Intermediate 4 min
How Phishing Paves the Way for Ransomware Attacks?
Hyperconnectivity is one of the key determinants of the digital world.
Foundational 3 min
Middle East is Ahead of other Nations in Adopting SPF, DKIM, and DMARC
The Middle East is outshining other nations with its remarkable commitment to email security.
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 6 min
When Should You Rotate Your DKIM Keys?
DKIM key rotation is an important security measure that ensures your DKIM records and email ecosystem aren’t exploited for long if keys are compromised.
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.
Intermediate 3 min
Sender Policy Framework Error Code 550- What Prompts it?
Sender Policy Framework allows domain owners to specify all the IP addresses that they allow to be used for sending emails.
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 5 min
Including Third-Party Vendors in Your SPF Record is Important; Here’s How It’s Done
Businesses outsource many tasks to third-party vendors, and if they send emails on your behalf, it’s important you make them a part of your SPF record.
Intermediate 5 min
AI Automation is Enabling CISOs and Their Teams to Be Quick and Accurate
Tech experts say that AI won’t replace humans any time soon. This is true.
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
Understanding How to Fix SPF Failure
Sender Policy Framework or SPF improves the sender’s reputation and email delivery in addition to keeping phishing and spoofing attacks at bay.
Advanced 4 min
How do you set up SPF and DKIM for Shopify?
Shopify is an e-commerce platform based out of Canada, and if you have an online store listed on it, then adding SPF and DKIM records is important.
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.
Advanced 6 min
Solving the 'Too Many DNS Lookup' Error
An SPF record can encounter different types of errors, causing it to become invalid and incapable of offering protection against phishing and spoofing email.
Intermediate 6 min
How to Merge SPF Records to Fix the ‘Multiple SPF Records’ Error?
It’s a good practice to regularly run your SPF record through a trusted and credible online SPF checker to come across any existing configurational and.
Intermediate 6 min
Email Header Analysis: Let’s Know an Email’s Anatomy
You receive much more than a message and attachments in an email; we are talking about bits of information retrieved during an email header analysis.
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