Right now the Exchange server is directly connected to the internet. It's = a Windows 2000 Small Business server, with Exchange and ISA installed. I= would just change the name of the server if I could. But it's a domain = controller.
Is there a solution to this problem using IMGATE/postfix? Thanks, David. -----Original Message----- From: Len Conrad <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Date: Thu, 16 Jan 2003 00:48:22 -0600 Subject: [IMGate] Re: Exchange server behind IMGATE >Maybe I'm calling it by a different name. I define "hostname verification= "=3D > where the recipients SMTP server verifies that the senders name matches = =3D >reverse lookup address. that's called reversing the ip, to get the PTR hostname, to see if that=20 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: 5.0.2195.5= 3=3D >29 ready at Wed, 15 Jan 2003 23:30:05 -0700=3D20 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 exchan= ge? The above reject means that exchange is refusing to accept mail destined to= yahoo, has nothing to do with PTR lookups. Len
