> If it were to accept mail - in a single session - that is destined for > more than one SMTP server, it would be unable to deliver to all the > recipients.
Then it's pretty badly broken. SMTP is defined as a store and forward protocol, 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. > So what I'd like to do is setup CNAME records for each domain that will > use the filter, and have them all point to the same place. ... > vansys.inbound.vansys.com CNAME aurorafilter.vansys.com > greatcircle.inbound.vansys.com CNAME aurorafilter.vansys.com > aurorafilter.vansys.com A 207.6.137.??? > > My hope is that the MTA's out there will deliver the second example > message in two separate session. Sometimes it'll work (if the sending system runs qmail, every delivery is separate anyway), sometimes it won't, depending on how the particular MTA is written. If I were intent on implementing this bad idea, I'd assign a bunch of virtual IPs to the machine doing the filtering, and give each incoming domain an MX that resolves to a different IP, which should prevent incoming sessions with recipients in multiple domains since they will appear to the outside to be different hosts. Then I'd get to work as soon as possible rewriting the filter so it handles SMTP correctly. 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
