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.
Knowledge Base
Blog
Expert guides on SPF, DKIM, DMARC, and email security.
Advanced 17 min
How Can I Check If My SPF Record Is Set Up Correctly Using An SPF Record Tester?
To check if your SPF record is set up correctly, run an SPF record tester (for example, AutoSPF’s free SPF Analyzer) by entering your domain.
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.
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.
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
DKIM RFC 6376 signs email messages cryptographically, and unlike SPF, the signature survives email forwarding - which is why DMARC alignment via DKIM is.
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.
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.
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!
The 12.4 billion shield for your email communications: Why DMARC software is the unsung hero in the war against phishing actors! explains SPF record.
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.
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.
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.
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.
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 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 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, General Manager 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.
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
Secure Your Outgoing Emails With A Trusted SPF DNS Checker explains SPF record management, sender authentication, troubleshooting steps, and how AutoSPF.
Intermediate 16 min
Why Businesses Should Switch To Dynamic SPF For Email Security
The Sender Policy Framework SPF serves as a cornerstone technology in email authentication and protection against email spoofing, a prevalent technique in.
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