RFC 7372 Proposed Standard Authentication

Email Authentication Status Codes

This document registers code points to allow status codes to be returned to an email client to indicate that a message is being rejected or deferred specifically because of email authentication failures. This document updates RFC 7208, since some of the code points registered replace the ones recommended for use in that document.

Status
Proposed Standard. On the standards track and stable enough to implement against. Most of the email stack stays at this level permanently.
Published
September 2014
Authors
M. Kucherawy
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rfc-editor.org · DOI

Normative requirements

Every sentence in this RFC carrying an RFC 2119 keyword, with the section it came from. 0 must, 1 should, 0 may.

4 General Considerations

  • SHOULDIf a receiving server performs multiple authentication checks and more than one of them fails, thus warranting rejection of the message, the SMTP server SHOULD use the code that indicates multiple methods failed rather than only reporting the first one that failed.

Every current email RFC