----- Original Message -----
> From: "José Ferreira" <jose.ferre...@anubisnetworks.com>
> To: "Hector Santos" <hsan...@isdg.net>
> Cc: dmarc@ietf.org
> Sent: Sunday, November 30, 2014 11:58:32 AM
> Subject: Re: [dmarc-ietf] DMARC and Bounces (was: Indirect Mail Flows)
>
> Forget about ML. I'm not only talking about ML but for a specific situation.
>
> Let me detail the issue.
>
> Most large system have several layers of defense. The edge system , after all
> teh checks, accepts the mail.
> When trying to deliver to the message store, it bounces ( the common example
> is the mailbox full )!.
>
> So the edge system generates a bounce message (MDN). Knowing that
> RFC5321.MailFrom will "<>".
> To be DMARC compliant the RFC5321.HELO/.EHLO name must be align with the
> RFC5322.From of the MDN.
>
> Again, this may be rare but should be referenced mainly because it can be
> easily overlooked.
>
>
> I guess I'm support Franck Martin when he wrote.
>
> "I guess these two (sendmail and postfix) are the backbone of many
> appliances...
>
> Therefore it is important to read
> http://trac.tools.ietf.org/html/rfc7208#section-10.1.3 on how to setup SPF
> to work with bounces."
>
> and adding that the RFC5321.MailFrom must be aligned. For Postfix, changing
> the From in MDNs is not trivial but also not that complicated.
>
It seems to me these things should go in a BCP or operational guidelines.
DMARC relies on underlying layers to work properly and postfix package should
be fixed, not sure what Wietse thinks about it.
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