Ralf Hildebrandt via Postfix-users:
> * Wesley via Postfix-users <postfix-users@postfix.org>:
>
> > > > Perhaps a Mailman "tuneup" is possible to harden it against this sort
> > > > of loop.
> > >
> > > Victor an I had a look and made some changes. I hope this mail goes
> > > through :)
> >
> > Why they had a chinese string added in the subject?
>
> Because some chinese server resent the mail back here (thus creating a
> loop).
And for some reason mail from list.sys4.de has adds no DELIVERED-TO: header
that would have (also) stopped this loop.
Can that (also) be fixed? If mail is delivered with LMTP, please add
-o flags=D
to the LMTP client command line.
If it is delivered with PIPE, then the same setting applies there.
Wietse
SMTP,(LMTP) SMTP,(LMTP)
NAME
smtp, lmtp - Postfix SMTP+LMTP client
...
flags=DORX (optional)
Optional message processing flags.
D Prepend a "Delivered-To: recipient" message header with
the envelope recipient address. Note: for this to work,
the transport_destination_recipient_limit must be 1 (see
SINGLE-RECIPIENT DELIVERY above for details).
The D flag also enforces loop detection: if a message al?
ready contains a Delivered-To: header with the same re?
cipient address, then the message is returned as undeliv?
erable. The address comparison is case insensitive.
This feature is available as of Postfix 3.5.
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