It appears that Todd Herr <[email protected]> said: >The entire paragraph from which that sentence was pulled reads: > >The case of a syntactically valid multi-valued RFC5322.From header field >presents a particular challenge. When a single RFC5322.From header field >contains multiple addresses, it is possible that there may be multiple >domains used in those addresses. The process in this case is to only >proceed with DMARC checking if the domain is identical for all of the >addresses in a multi-valued RFC5322.From header field. Multi-valued >RFC5322.From header fields with multiple domains MUST be exempt from DMARC >checking. > >In the case where DMARC checking is not performed, there will be no DMARC >pass.
We ratholed on this the last time around. Non-malicious messages with multiple From addresses are very rare, and messages with addresses in different domains are rarer still. I agree it makes sense to punt on the latter, since they basically don't exist. I wouldn't mind even saying that messages with more than one address on the From: line are never aligned, but there are so few it's a tiny corner case. R's, John _______________________________________________ dmarc mailing list [email protected] https://www.ietf.org/mailman/listinfo/dmarc
