Delete mailing list
You can remove unwanted Mailman mailing list easily through Cpanel hosting account control panel .
NOTE: Please be noted that removing mailing list will also remove archives of this mailing list, current mail messages for this mailing list in the mailing list queue, and subscribed members email addresses. Please be sure the backup all needed information and files before removing the mailing list as the delete process is permanent and irreversable.
To remove mailing list:
Click Mailing Lists link in the Mail option after login to your Cpanel control panel.
Click Delete button next to mailing list name you wish to remove.
Click Yes to confirm the deletion.