RE: SPF will solve spam and punish spammers

On Fri, 23 Jul 2004 17:30:51 -0500, Len Conrad wrote
> > All of these MTAs also have a few DoS vulnerabilites.
> Doesn't Exchange do per-domain reception, "catch all", and then 
> reject if recipient unknown?
5.5 does.  I don't know about 2000.

Anyone who lets an Exchange 5.5 server talk directly to the Internet at large
is doing the rest of us a big disservice.