[Mailman-Users] To: is being rewritten by some mail agents

[Scott Chapman]

I have a mailing list on my server, running Postfix as my MTA with virtual 
domains.  I'm using Dax Kelson's postfix-to-mailman.py which appears to be 
working fine (see here: http://listes.rezo.net/how.php).

I send a message to one of my lists.

The "To:" line in the header reads:
   To: iae-staff at lists.appliedeco.org
... when I send it.

Some users are seeing it when it arrives as:
   To: iae-staff at www.mischko.com
... which is the name my server EHLO's as when it sends email out, and is the 
canonical name for my server.

I packet-sniffed the email going to one of these servers that rewrites the To: 
line and find that it's using Sendmail.  I also confirmed that the To: line 
_is_ going out correctly.  I have an account on one of these offending servers 
and I see it as www.mischko.com on that account also.

Anyone else seen stuff like this?

Any thing I can do to fix this?

It's causing problems because users try sending to iae-staff at www.mischko.com 
by clicking on the address they see and that's not the right address for my lists.

Scott