Where are the Mailing Lists for cPanel Users Stored?
The mailing lists created from the cPanel accounts are stored in the directory:
/usr/local/cpanel/3rdparty/mailman/lists. The name of each mailing list directory will contain the list name and the domain. For example, if you had a mailing list named "testing" and the domain, "cptechs.com," the directory for mailing list would be:
Each mailing list will have its own directory, and if necessary the mailing lists can be manually backed up and moved if to another server.