[Mailman-Users] Return Path

[Petra Humann]

Hello,

I'm running mailman 2.1.5 with Sun Messaging Server.

I noticed, that every mail has two "Return-Path" headers:
> Return-path: <mylist-bounces at mylist.host.domain.de>
> Return-path: <original-sender at some.domain.com>

Running mailman version 2.1.1 with sendmail only one
Return-Path header exists.
> Return-path: <mylist-bounces at mylist.host.domain.de>

Are two Return-Path headers okay?

Some mails fail,the notifications to the postmaster include the
reason, e.g.:

> Sat, 25 Jun 2005 21:25:08 +0200 (MEST)
> Error reading SMTP packet; response to RCPT TO command expected

I assume, that the two Return-Path headers are the reason.
How do I correct this?

Thank you very much.
P.