[Mailman-Users] sendmail and mailman

[John E.P. Hynes]

Greetings,

Here's my issue:

Mailman is installed on a host which is an MX for two domains.

domain1 gets forwarded to another mail hub.
domain2 gets delivered locally, and there are no users except the mailman
aliases.

This mail host uses masquerade_as to rewrite outgoing addresses as domain1.

Therefore, if you subscibe to a list, using the web link to authorize the
subscription works fine, but hitting reply doesn't, as it'll go to
(mailman-alias)@domain1.com, which doesn't exist.

Does anyone know how to make sendmail NOT masquerade domain2 if it
originates from the relay host itself?

Thanks,

-John