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Re: Relaying to SPF protected server

From: Wietse Venema (wietseporcupine.org)
Date: Sat Apr 03 2010 - 14:21:44 CDT


Jose Ildefonso Camargo Tolosa:
> Hi!
>
> This is getting interesting..... How, exactly, does mailman (or other
> mailing list manager) handles this? I mean, I have seen several
> SPF-enabled domains, and these domains have subscriptions to one or
> more lists... now, reading the headers for one of the messages of this
> lists, I got this:
>
> Sender: owner-postfix-userspostfix.org
>
> So... my guess is that the SPF check will go against this mail
> address, not the one on the From field..... am I right?
>
> What do you think?

SPF uses the address in MAIL FROM command. This is sent before
the RCPT TO command and before the message header/body.

        Wietse