DMARC.AI

The 2026 email security stack is DMARC, BIMI, MTA-STS, and TLS-RPT. Here’s how each fits and why the combination is the new baseline.

Secure email gateways sit in the mail flow and affect authentication. Here’s how SEGs interact with DMARC, SPF, and DKIM — and the common gotchas.

BIMI requires DMARC at quarantine or reject, plus a VMC. Here’s the full requirements list and why enforcement is the gating prerequisite.

BIMI puts your verified logo next to your brand’s email in supported inboxes. Here’s how it works, why it requires DMARC enforcement, and what to deploy.

A concrete checklist for getting email authentication right: SPF, DKIM, DMARC, BIMI, MTA-STS. Tick each box once and the rest is monitoring.

SPF lists allowed IPs, DKIM signs messages, DMARC publishes the policy. Here’s exactly how the three interlock to produce real email authentication.

DKIM proves a message was signed — but proves nothing about who’s supposed to sign. Here’s why DKIM alone can’t protect your domain from spoofing.

SPF lists allowed IPs but can’t bind a message to your domain. Here’s why it can’t stop spoofing on its own — and why DMARC needs DKIM too.

A DKIM selector is the label letting one domain hold multiple DKIM keys. How it works, why to use distinct selectors per sender, and how to manage them.

DKIM is the cryptographic signature that proves a message came from your domain. Here’s how it works, why DMARC relies on it, and how to set it up.