Sylvain Viart writes: > Le 18/04/2014 09:41, Alain Williams a écrit : > >> I may have missed some topic, but why SRS > >> (http://en.wikipedia.org/wiki/Sender_Rewriting_Scheme) doesn't > >> come to rescue here? > > SRS rewrites the *envelope* sender. > > > > My understanding is that the YAHOO DKIM uses the From: header, > > not the envelope sender. > > Oh I see. Thanks. > So to use mail's Header terminology, only the Return-path: is modified, > not the From:
No, the envelope sender often does end up in Return-Path, but it need not. The envelope sender is the entity in the SMTP "MAIL FROM" command, not anything in the headers. > Is this related to DMARC in general? Yes. DMARC is designed to work with "From alignment", that is, authenticating the domain in the from header. It *can* also authenticate the mailbox using DKIM, but there's no guarantee that a third party can see. The reason for this is that the DMARC authors are concerned about phishing, which basically works by sending a fake "From". Therefore they want to ensure that only the real domain can send "From" that domain. > May be not corrected by SRS, because of DMARC is more recent than > SRS… They're completely unrelated. > Or this is a yahoo challenging with a somewhat too strong > configuration? Yahoo is following the DMARC standard. They don't believe it is "too strong". See above. ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org https://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-users/archive%40jab.org