> The web interface is up for our system and I was wondering about something
> that may be a problem and may not be ...
> I am an owner of a list that is gated to a newsgroup.  The list goes back
> to Bitnet times and is public.  I registered my email address with the
> listserver and made a test post to the list.  The e-address I registered
> showed up in the "From:".  Of course it is a valid address.  But if the
> address became invalid, I would still be able to post and the invalid
> address would show up as the return.  Is it reasonable to have the
> Listserver probe its list of registrants or is this too much overhead just
> to handle public lists?  Does anyone see the possibly not having valid
> return addresses as a problem?  I myself can't say how serious this might
> be; there isn't a great deal of spam in the present setup, so there may
> well be no real cause for concern.  Still, I wondered what others thought.
> -- Joe Kelley
>    [log in to unmask]

There's no 100% certain way to test the validity of an email address
short of sending mail to it and seeing if it bounces.  If you set
Send=Private so that only subscribers can post and use passive probing
to eliminate invalid subscriber addresses, you will limit the
opportunity for someone with a bad address to post.