Comment 5 for bug 659975

OK; the key bit I missed was that the incorrectly parsed email address was broken over two lines.

Using a standalone mailman + postfix setup on Hardy I have been able to reproduce using the following procedure:

  Install postfix and configure as final destination for <hostname>.example.com
  Setup three users (user1, user2 and user3)
  Install mailman and setup default (mailman) and test-list (with user1 as list owner) list.
  Configure Apache to allow administration of mail lists
  Install and configure dovecot for local mail delivery.
  Add user2 to the test-list mail list using the administration screens

Using the attached email (test.txt), simulate the offending use case using the following command using the user1 account:

  telnet localhost 25 < test.txt

The posting to the test-list mailing list incorrectly has two emails addresses:

Date: Mon, 18 Oct 2010 10:44:12 +0100 (BST)
From: <email address hidden>
Cc: three <email address hidden>,
 <email address hidden>, <email address hidden>
Subject: [Test-list] Test

Test Email
_______________________________________________
Test-list mailing list
<email address hidden>
http://hardy-mailman.example.com/cgi-bin/mailman/listinfo/test-list