> > if you accept mail for a domain at all, > > you have to accept it mixed in with all the other domains for > > which you accept mail. > > A question - why do you think this is a bad idea? I'm assuming I didn't > make a clear-enough description in the first place.
Filtering mail proxies are a fine idea, there are lots of them around. Proxies purporting to receive SMTP mail that can't actually accept legitimate RFC821-conformant incoming mail are a bad idea. The RFC says that CNAMEs are resolved to underlying names, so multiple CNAMEs for the same name are unlikely to get you separate deliveries. It doesn't say anything either way about several different names resolving to the same IP, so you'd be at the mercy of present and future MTA programmers. You know, there's no reason why your proxy can't open multiple outgoing connections and run them in parallel, if you want to sniff the underlying servers. Regards, John Levine, [EMAIL PROTECTED], Primary Perpetrator of "The Internet for Dummies", Information Superhighwayman wanna-be, http://iecc.com/johnl, Sewer Commissioner Write for PGP key, f'print = 3A 5B D0 3F D9 A0 6A A4 2D AC 1E 9E A6 36 A3 47
