> Only people who have subscribed to a mailing list are able to
> send mail to it. If someone sends mail to a list he isn't
> subscribed to, a mail should be returned giving info on who to
> subscribe to the mailing list.
> 
> How's that sound?

Great, except in practice.  8-)

I'm subscribed to the lists via one address, and typically post from
at least two others...  and have been known to post to them from many
others...

How do you handle that in a sane way?


chris