Hi, On 09/16/14 05:08, Murray S. Kucherawy wrote:
URL: https://www.rfc-editor.org/rfc/rfc7372.txtThis 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.
I hope this is not off topic here: RFC 7372 proposes to use a 550 response code for reverse DNS auth failures, see section 3.3. Reverse DNS checks are usually done early in the connection (like IP blocks) in the connection establishment stage of the SMTP dialog. RFC 5321 allows only a 554 error response there, see section 4.3.2. So, shouldn't a 554 code be used here? Or does RFC 5321 need an update? Greetings, -- Sven Krohlas Mailsecurity Agent Mail Application Security _______________________________________________ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
