#spf

Short answer: treat SPF, DKIM, and DMARC as one identity decision for each message, then manage the...

Short answer: publish SPF and DKIM. They solve different problems. SPF authorizes a sending server,...

A staged DMARC rollout sequence that treats aggregate report reading as the control that governs each policy transition.

Short answer: Publish and align both SPF and DKIM; forwarding can break SPF while preserving DKIM, so...

Short answer: publish SPF, DKIM, and DMARC for a logistics sending domain, then test alignment after...

A media hostname cutover should begin in monitoring mode, with rollback kept available until every...

The page fires at 02:17 during a controlled marketplace launch drill: SPF and DKIM publishing...

A custom-domain feature creates an operating problem, not three DNS chores. SPF and DKIM make...

A media company cannot treat sending-domain setup as three harmless admin-console writes. The...

Forwarding is the constraint that changes this decision. It routinely breaks SPF, while a valid DKIM...

Short answer: treat SPF, DKIM, and DMARC as one release unit. SPF and DKIM each make a claim about...

A relay with more than two years of uptime failed nearly every Gmail delivery because SPF, DKIM and forward-confirmed reverse DNS were broken independently. The root cause of the DKIM half was one word: tables mounted as refile: instead of file:, whi