Mailman not sending mail to mailing lists.

[avangel]

A customer has recently noted that no mailman lists he has are working properly. They actually don't work at all--they never send out mail, not even notifications.

Exim appears to be working correctly and can send email, and mailman is running.

Does anyone have any ideas?

[lloyd_tennison]

Need more information as to what is happening. Send a message to the list and check through exim to make sure it gets there, would be the first step. Asumming it is even running...