[Mailman-Users] Bulk subscribe users

[Richard Eames]

I'm evaluating Mailman and I'm quite impressed. However, one criteria is to be able to subscribe a large (2000+) number of users and be able to remove/add users based on information we receive on a regular basis. Is there a way to add/delete or modify subscription by email (as the list owner not as a user wanting to subscribe etc)? In fact are there any admin commands available using email instead of the web interface ?

                           Much Thanks