[Mailman-Users] Announce only?

[Dale Rose]

Is it possible to make a mailman list announce only?

I've got the list reply-to address set to a specific, non-list address
but if the end user chooses to reply to all, the list address gets
included as well.  We try to keep all subscribers set to moderated,
but inevitably one or two will get through.

Can the list be set so that only messages from specified addresses get
posted, regardless of moderated status?

Many thanks,

Dale