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Subject: Re: Conditional rewriting of "From: ..."
From: Jürgen Fluk (louisntm-gmbh.de)
Date: Tue Feb 15 2000 - 01:37:26 CST

Wietse Venema wrote:
> Postfix is written with the bold assumption that it produces
> userdomain addresses that are globally valid. It has no code for
> context-dependent address rewriting.
>
> If your mail addresses are context-dependent, consider using a mail
> USER AGENT that produces addresses in the proper form, instead of
> using the mail TRANSPORT AGENT to patch things up.
>
> Wietse

Postfix does it right. But I also see the need for rewriting From: lines
(or headers in general) or have the possibility to reject "bad" headers.
Headers are under user control, and I would like to not pass messages from
our users to the outside if I can detect that they are wrong (bad or
invalid
return addresses). Or maybe I want to force a certain policy on From:
syntax,
so change login names to firstname.lastname for example.

Maybe this is not a common need. But there is no hook at all (?) for this.
Currently I use a pipe transport and a second mail server to implement
header
rewrites, and this sounds like too much pain.

louis 

-- 
Jürgen Fluk                                 louisntm-gmbh.de
New Technologies Management GmbH            Tel +49 89 993415-56
Stefan-George-Ring 24, D-81929 München      Fax +49 89 993411-99