[Mailman-Users] Security in an nnouncement only list

[Jeff Pflueger]

Hi.
I'm setting up an announcement only list on mailman 2.1: Only one email 
address announcing to an audience of several who receive messages. 
Everything is working great, but there seems to be a glaring security 
hole: Somebody can fake the From: in the email and post to the entire 
list. The best way around this (available in the Listserv software) is 
an email confirmation sent to the poster.

Is there a way to set this up in mailman? Could I set up the poster to 
be moderated by himself or something like that?

Thanks!
Jeff