[Mailman-Users] List has been running for a year and suddenly last night it stopped.

[Angus]

Mail is working, List subscription is working. Mails to the list are 
not working.

Its mailman 2.12 and and my server also has CLAMAV and Spam Assasin run 
by mail scanner.

Before I tear my hair out can anyone point me at some basic things I 
can check. Its been working perfectly for over a year in this config 
sending to a 400 strong list. Nothing has changed that I am aware of on 
the Cobalt Raq 550r server its on.

Angus