>Maybe I'm calling it by a different name. I define "hostname verification"= > where the recipients SMTP server verifies that the senders name matches = >reverse lookup address.
that's called reversing the ip, to get the PTR hostname, to see if that hostname has an A record RDATA that matches the sending ip. or something > The following is a SMTP connection log: > >SMTP Connection: >OK, connected to 166.xxx.xx.xx... >< 220 ntserver.xyz.local Microsoft ESMTP MAIL Service, Version: 5.0.2195.53= >29 ready at Wed, 15 Jan 2003 23:30:05 -0700=20 ok, the exchange server has been setup with a private, internal TLD, apparently. > > HELO edit.dnsvr.com >< 250 ntserver.xyz.local Hello [64.21.143.29] > > MAIL FROM:<[EMAIL PROTECTED]> >< 250 2.1.0 [EMAIL PROTECTED] OK > > RCPT TO:<[EMAIL PROTECTED]> >< 550 5.7.1 Unable to relay for [EMAIL PROTECTED] great, the logs tell us everything. can you paste in the imgate logs, also, imgate is communicating with exchange? The above reject means that exchange is refusing to accept mail destined to yahoo, has nothing to do with PTR lookups. Len
