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.
Knowledge Base
Blog
Expert guides on SPF, DKIM, DMARC, and email security.
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 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 - it’s a foundational requirement for any business that wants reliable inbox.
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
When organizations use third-party email platforms like Mailjet, proper SPF and DKIM configuration becomes a non-negotiable requirement for inbox.
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 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
Mandrill SPF & DKIM Configuration: A Complete Step-by-Step Guide by AutoSPF explains SPF record management, sender authentication, troubleshooting steps,.
Intermediate 7 min
A Complete Guide to Configuring SPF & DKIM for Mailigen (and Why It Matters)
In the fast-paced digital world, your inbox is both a critical communication channel and a major point of vulnerability.
Foundational 12 min
How Can I Perform An SPF Lookup For My Domain To Check Authorization Records?
You can perform an SPF lookup for your domain by querying its DNS TXT record containing “v=spf1” using command‑line tools (dig, nslookup.
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.
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.
Intermediate 7 min
AutoSPF Complete Guide to Configuring SPF and DKIM for MailerLite
Every successful campaign sent through MailerLite depends on proper email authentication behind the scenes - and at the core of that authentication are.
Intermediate 12 min
How can I simplify a complex SPF record flagged by Kitterman without losing legitimate senders?
To simplify a complex SPF record flagged by Kitterman without losing legitimate senders, audit and inventory every real sender.
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
SendGrid SPF & DKIM Setup: Authentication Guide
Set up SPF, DKIM, and DMARC for SendGrid correctly. A step-by-step guide to authenticating your domain and keeping SendGrid email out of spam.
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 8 min
FreshMail SPF & DKIM Setup: A Complete Guide
Authenticate your FreshMail email with SPF and DKIM. Follow this complete, step-by-step setup guide to improve deliverability and prevent spoofing.
Advanced 13 min
How Can I Identify SPF Include Loops Or Recursive Includes With A Validator?
Use a DNS-aware, graph-based SPF validator that expands every include/redirect into an explicit include graph and runs cycle detection (e.g.
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.
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.
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