Multiple From: headers is invalid per RFC. There must be one and one only From: header in all emails. Most MTAs do not care. If you deploy DMARC I strongly suggest you do that check and bounce.
What we are talking is multiple emails in the From: header, which is valid as per RFC On Jul 16, 2013, at 9:47 AM, Tim Starr <[email protected]> wrote: > I've seen multiple Froms in the wild, but only in error, and the only > way I found them was in Gmail bounces, citing the RFC as saying they > were invalid. So, Gmail at least seems to take the position that > nothing should be sent with multiple Froms. Does anyone else actually > treat them as valid? > _______________________________________________ dmarc-discuss mailing list [email protected] http://www.dmarc.org/mailman/listinfo/dmarc-discuss NOTE: Participating in this list means you agree to the DMARC Note Well terms (http://www.dmarc.org/note_well.html)
