Make Migration & Transfer Manager properly migrate mailman lists
Completely and correctly migrate mailing lists options and especially archives.
Bob B commented
Additionally, until this functionality is added to Plesk, the Migration Manager should display a warning, indicating what will not be transferred, when there are mailing lists to be transferred. Otherwise, administrators and end users are surprised when a private mailing list, all of a sudden, becomes public, because the advanced settings were not transferred.
Eddy Bonilla Mercado commented
Currently it is not possible to migrate Mailman archives using Plesk Migrator Manager. It would be great extension to Plesk Migrator to make it possible to transfer Mailman Archives too.