[Mailman-Users] options to protect a mailing list

[zbigniew szalbot]

Hello,

I have a newsletter type mailing list. Messages from a specific address 
are automatically distributed to the list members. Messages from other 
addresses are discarded. Since the messages are sent at night, what are 
my options to automatically send them without risking that someone else 
will forge the FROM address and send spam or whatever to the list? How 
do you handle that? Human moderation is not possible because the 
messages should be sent around 3 a.m. at which time there's no one 
around to moderate.

Thank you!

Zbigniew Szalbot