We do not transform Majordomo mailing lists to Mailman or copy that info towards the cPanel & WHM server. If your server includes mailing lists, you'll be able to recreate them with cPanel’s Mailman interface ( If you want much more computing ability and storage, the DS-256 w/Managed Support approach https://martinwmoeq.glifeblog.com/27605271/cpanel-server-migration-an-overview