Hi,
I found a bug related to mailman.
Recently I changed the IP address of the iMSCP server running /var/www/imscp/engine/setup/imscp-reconfigure
and selecting only the new IP address (old one was deleted on /etc/network/interfaces previously)
X.X.X.X new IP
Y.Y.Y.Y previous IP
It changed all the apache sites .conf files appending the new IP beside the old IP.
<VirtualHost X.X.X.X:80 Y.Y.Y.Y:80>
But, after doing that, if I create a new list, the list.example.com.conf file is created with the old IP:
<VirtualHost Y.Y.Y.Y:80>
Regards