[dmarc-discuss] dmarc-discuss Digest, Vol 19, Issue 3

Murray Kucherawy msk at fb.com
Tue Jul 16 10:47:05 PDT 2013

On 7/16/13 9:58 AM, "Franck Martin" <fmartin at linkedin.com> wrote:
>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

+1.  There's an RFC under development that goes into some detail on this
topic, but the long and short of it is that a multi-From message is
invalid by the specs and really ought to be rejected by the submission
agents as well as receiving MTAs.  RFC6376 said this too.


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