I have an ISP Config 3 server setup on Centos 6 X86_64 as per the "Perfect Server" instructions. I now want to add Mailman lists. The manual only advises that Mailman should be installed BEFORE ISPConfig 3. I did not do this, and so I would like to know how to install and integrate it afterwards. I have installed mailman, and can create mail lists using the ISPConfig control panel. I have integrated it into apache and can get to the Mailman administration pages for each list. However, there is some part of the integration into Postfix that is eluding me. Mailman has the virtual alias files: "/etc/mailman/aliases" and "/etc/mailman/virtual-mailman". Do these need to be included in the list of virtual_alias_maps in the Postfix main.cf file, or should their information be in the mySQL database? Advice on the configuration steps required to integrate mailman into a working ISPConfig setup would be appreciated.