[Mailman-Users] bounces stopped on all lists

[Kaitlyn Taylor Considine]

A few weeks ago all mailman list owners stopped receiving bounces of any 
kind. They are not being misdirected to any of the cpanel WHM server 
contacts either. They can be seen briefly at 
/usr/local/cpanel/3rdparty/mailman/data/bounce-events-#####.pck and then 
those disappear as well, likely assuming they were delivered.

My sys guy has been unable to fix it....thinks it's a cpanel issue.

Any ideas?

Kaitlyn