Mailing List Problems

[jackal]

We have a site/domain name that we moved from one server to a new server. Site is working great on new server no problems.
We have terminated account on old server through WHM. Removal went as usual no problems so we thought. We have one small problem.
When site was old server client had 2 mailing list setup. When we terminated account we thought these were also removed. Client notified us this morning that he still received mialings regarding memberships from old server even though his account is terminated there.
Where we we look ( path ) on old server to remove mailing lists under his username there?

[FWC]

You should be able to find them here:

/usr/local/cpanel/3rdparty/mailman/lists

[jackal]

Thanks found them.