[Mailman-Users] Unsubscribe Using Web Form

[Richard Damon]

Mailman tries (and I think succeeds) at not letting an outsider know who 
is subscribed to a list (unless the list publishes its member list, then 
that list will reveal those who don't hide their email address.)

If you want to help someone unsubscribe without them needing to use the 
confirmation email, you should first validate that the email address is 
theirs (maybe through having your own account system where they have 
confirmed that the email address is theirs), then, using the admin 
password, check the membership list for the email, and then you can use 
the web form to unsubscribe them, again using the admin password.