Message Header Field for Indicating Message Authentication Status
This specification has been revised 5 times since RFC 5451 (2009). Each document below formally obsoleted the one before it; the versions still in force are listed first.
Revision timeline
Current version — implement against this
Superseded versions — historical reference only
- RFC 5451Message Header Field for Indicating Message Authentication StatusObsoletedApril 2009proposed standardreplaced by RFC7001
- RFC 6577Authentication-Results Registration Update for Sender Policy Framework (SPF) ResultsObsoletedMarch 2012proposed standardreplaced by RFC7001
- RFC 7001Message Header Field for Indicating Message Authentication StatusObsoletedSeptember 2013proposed standardreplaced by RFC7601
- RFC 7410A Property Types Registry for the Authentication-Results Header FieldObsoletedDecember 2014proposed standardreplaced by RFC7601
- RFC 7601Message Header Field for Indicating Message Authentication StatusObsoletedAugust 2015proposed standardreplaced by RFC8601
This lineage is derived automatically from the “obsoletes” relationships recorded in the public RFC Editor index — no editorial judgement is applied to the ordering. The most recent document in the chain is RFC 8601 (May 2019).