Mailgun: DMARCbis is dead. Long live DMARC . The updated DMARC standard is here. Here’s what changed, what didn’t, and what it means when you send through Mailgun. Table of contents 01 DMARCbisis now just…DMARC 02 What changed in the spec (short version) 03 What did not change 04 Mailgun’sauthenticated‑domainmodel 05 Practical DMARC maintenance: What Mailgun senders should review DMARCbis is now just…DMARC Just when you were getting comfortable with new DMARC policies… In May 2026, the IETF…
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