Hello folks,
If your mailinglist filling too much disk space on the server and you are not able to locate the mailinglist directory on the server then don't worry, this post will help you.
Login to your server through SSH using root details.
Change directory to /usr/local/cpanel/3rdparty/mailman/archives/private/
Quote#cd /usr/local/cpanel/3rdparty/mailman/archives/private/
Now find for your corresponding mailing list name and domain.
Quote#cd listname_yourdomain.ext
Then delete the files related to your list executing
EX:Quote#rm -fR 2014-Dec*
#rm -fR 2014-Oct*
That's all, Enjoy !! :)