[Mailman-Users] What is the best way to avoid fake senders?

[Δημήτριος Καραπιπέρης]

Hi all,

I am investigating ways how to avoid any fake senders trying to get 
through and approach my recipients.

I concluded the following
a) use envelope_sender to figure out the sender
b) moderate all posts

Waiting for your suggestions

Thanks in advance
Dimitrios