[Mailman-Users] Discarding recipiens by domain

We want to discard posting mail users from certain domains. And we can't achieve that using regular expressions. As far as we´ve read on the documentation this is supposed to be posible, but we can´t find the way. Thanks in advance -- Mailman-Use

[Mailman-Users] Mail delivery notification

We're deploying mailman to deliver information to a lot of people (1200 suscribers). The suscribers can't post to the list. We need to receive a notification that the suscribers had received the mail. We where thinking in adding a header that makes the mail client return an automatic answer. Any