[Mailman-Users] e-mail to lists are rejected

[Emmett Culley]

I running a RH 7.3 distro, and am using Mailman with sendmail and
apache.  I can successfully send and receive e-mail both locally and
remotely, and the web server works correctly as well.

I've managed to get Mailman installed with the web interface working.  I
can add a new list and the list owner gets the notification message.  I
can add users from the admin page and they get the notification.

In all cases, replies to the addresses given in the notifications are
rejected by the server.  As are posts to the list.

I can see that the messages to the list are rejected (maillog) as "User
unknown".  I can see in the cron log that qrunner is invoked every
minute.  I disabled the "news" portion in crontab.in.

I run into the end of my understanding of the "connection" from sendmail
to Mailman and cannot seem to find the information on the web.

None of the e-mail from this group or in the archives seems to address
this particular problem.  I am sure it is my configuration.

I'd be grateful for any help.

Emmett