How to Prevent Email Spoofing on Your Domain
Stop attackers from sending emails as your domain. Set up SPF, DKIM, and DMARC step by step - with common mistakes to avoid and testing instructions.
The Complete Guide to Email Authentication: SPF, DKIM, DMARC, and Beyond
Everything you need to know about email authentication in one place. How SPF, DKIM, and DMARC work together, how to set them up, and common mistakes to avoid.
Why Strict DMARC Rejection Is Not Always the Right Choice
DMARC p=reject sounds like the gold standard. But blindly rejecting DMARC failures breaks email forwarding for thousands of users. Here is the nuance.
What Is ARC (Authenticated Received Chain) and Why Email Forwarding Needs It
ARC allows email forwarders to preserve authentication results across hops. Learn how Authenticated Received Chain works, who supports it, and why it complements SRS rather than replacing it.
Why Your Email Forwarder Breaks SPF (and How SRS Fixes It)
Email forwarding breaks SPF authentication by design. Here is why it happens, what SRS does to fix it, and why this matters for deliverability.
Google and Yahoo Email Requirements: What Changed and What You Need to Do
In 2024, Google and Yahoo enforced strict authentication and unsubscribe requirements for bulk senders. Here is what you need to comply.
DMARC Alignment Explained: Why Authentication Alone Is Not Enough
Passing SPF and DKIM is not enough for DMARC. Learn what identifier alignment means, the difference between relaxed and strict modes, and why forwarding breaks SPF alignment but preserves DKIM alignment.
How Phishers Bypass SPF and DKIM: Attack Techniques Explained
SPF, DKIM, and DMARC are the backbone of email authentication, but attackers have developed sophisticated techniques to slip past them. From cousin domains and subdomain delegation abuse to DKIM replay attacks and unicode homoglyphs, here is how phishers actually bypass your defenses.
Email Authentication in Practice: When SPF, DKIM, and DMARC Pass and When They Fail
You know what SPF, DKIM, and DMARC are. But do you know why forwarded email fails SPF? Why mailing lists break DKIM? Why DMARC can reject legitimate email? Real-world scenarios explained.
What Is Email Spoofing and How to Prevent It
Email spoofing lets anyone forge the From address in an email. Learn why SMTP makes this possible, how attackers exploit it, and the exact steps to protect your domain with SPF, DKIM, and DMARC.
