On Sat, 24 Apr 2004, Marc Perkel wrote:
>
> Obviously - you don't want anyone relaying for anyone.
In addition to what Greg said, there are lots of examples of legitimate
(and desirable) relaying, such as firewall MTAs (which do both outgoing
and incoming relaying), fallback MXs, store-and-forward relays for
intermitently-connected hosts, virtual domains that contain only
forwarding aliases, etc.
You might also look at RFC 1711.
--
Tony Finch <dot@???>
http://dotat.at/