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Subject: Re: sendmail -f <>
From: Lawrence Greenfield (leg+andrew.cmu.edu)
Date: Fri Jul 14 2000 - 18:26:20 CDT


   Date: Fri, 14 Jul 2000 18:59:46 -0400 (EDT)
   From: wietseporcupine.org (Wietse Venema)

   LaMont Jones:
> > Should all null string instances be replaced by MAILER-DAEMON or
> > just the one that would appear when Postfix generates a missing
> > From: message header?
>
> Putting mailer-daemon in instead of <> has resulted in some neato mail
> loops for us (rather than just a double-bounce that stopped at that).
> I'd much rather not see it to mailer-daemon....

   Would it still be OK to substitute MAILER-DAEMON in the From:
   message header when Postfix is going to insert one?

   The envelope sender address would remain <> as per the RFC recommendation.

This is good news; Sendmail currently changes <> to a MAILER-DAEMON
address when doing local deliveries, and it causes quite a few
annoying problems dealing with smart local delivery agents, especially
using LMTP.

Larry