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RFC 7489, "Domain-based Message Authentication, Reporting, and Conformance (DMARC)", March 2015


Errata ID: 5552
Status: Reported
Type: Technical
Publication Format(s) : TEXT

Reported By: Borislav Petrov
Date Reported: 2018-11-09

Section 10.3. says:

Everything about it..


DMARC relies on inspecting header information. This section suggestion is not allowed by rfc5321 and contradicts it:

...a relay SMTP has no need to inspect or
act upon the header section or body of the message data and MUST NOT
do so except to add its own "Received:" header field..

So the correct behaviour shoud be only the second option - 2xy and decide what to do after that being silent or not.

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