RE: RBL-type BGP service for known rogue networks?

["Derek J. Balling" <dredd () megacity org>]

> Also, as I
> said, there are valid reasons to allow third-party relays. In
> fact, they are even required, depending on circumstances.

Sorry... don't buy it. Upgrade your MTA to sendmail 8.10 or above and 
have your customers use current versions of their MUA's if they wish 
to travel. SMTP-AUTH is your friend and it appears to be fairly well 
supported now within the various consumer MUA's. (Admittedly, this 
time last year that wasn't necessarily the case)

I fail to see an occurrence where an open relay is "necessary". Can 
you describe one for me?

D