sylvia nicole wrote:

Is it possible to modify Mailman without too much work to do the following:

1. users can unsubscribe by email and email confirmation, without password and without webpage
2. users can subscribe by email and email confirmation, without password and without webpage

sub/unsub by email already works.

"no passwords" is an often-requested feature that has not yet been added.

3. only the admin can post to the list. List members cannot post to the list.

Read 'Details' on the last item in Privacy/General posting filters.