On Tue, May 12, 2009 at 05:35:48PM -0400, Wietse Venema wrote:
> For example, to replace the envelope sender address of outside
> senders by foo...@example.com:
>
> /etc/postfix/main.cf:
> # Rewrite envelope sender only.
> sender_canonical_classes = envelope_sender
> sender_canonical_maps = pcre:/etc/postfix/sender_canonical
>
> /etc/postfix/sender_canonical:
> # Replace non-local address by foo...@example.com.
> if !/@example\.com$/
> /./ foo...@example.com
> endif
>
> This does not change the address in the From: header. However, some
> mail clients may display the sender address in a way that shows
> the modified envelope sender address. But I suppose that is not
> a big problem.
I've never seen mainstream MUA that display the envelope sender. Some
will diplay the "Sender:" header when different from "From:", as:
From: <Sender> on behalf of <From>
So rewriting the envelope sender (aka Return-Path) is unlikely to be
a big concern from the MUA perspective.
--
Viktor.
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