#emailauthentication

Marketplace email breaks in an awkward place: the team can know exactly what a customer should...

Short answer: make an idempotent upsert the normal reconciliation path for SPF, DKIM, and DMARC, but...

Poor deliverability silently kills your pipeline. Learn the core technical and operational factors that determine whether your emails land in inboxes or spam folders.

DMARC aggregate reports look hostile but have only three sections. This guide walks through a real RFC 9990 report field by field, shows the seven row patterns you will actually see, and tells you what to do about each one.

More than half of all domains with a DMARC record collect no reports at all. Here is how DMARC monitoring works, how to read an aggregate report, what RFC 9990 changed in 2026, and how to reach p=reject without blocking your own mail.

An SPF record is one DNS TXT record that starts with v=spf1, lists your authorized senders and ends with an all mechanism. Here is every mechanism, every qualifier and every hard limit in RFC 7208 that quietly breaks records which otherwise look fine

DKIM adds a cryptographic signature to every email your domain sends, so receiving servers can prove the message is genuine and unaltered. Here is how it works, how to set it up, and the mistakes that quietly break it.

SPF, DKIM and DMARC all live in DNS, and most authentication failures come down to how those records are published rather than the policy itself. This guide covers where each record goes, the common hosting mistakes, and how to check your work.

📧 Email Security How enterprise email security works, how attackers exploit email, and how to build...

BIMI puts your logo in the inbox, but only once your email authentication is right. Here is what to fix first.

Your DMARC policy might protect your main domain while leaving every subdomain wide open. Here is how the sp tag works, why it exists, and how to set it correctly.

DKIM proves your email really came from you, but only if it stays valid. Here is why it needs monitoring.