It's a Reverse DNS (RDNS) problem. I'm curious who is telling you your email server has to start with a three digit code. It doesn't have to of course unless some other service provider has that requirement. Do you have AV or AS filtering provided to you by third party? Anyway, Google RDNS and settle in for a long read.
Cheers. -----Original Message----- From: Victor Rodriguez [mailto:[EMAIL PROTECTED] Sent: Monday, January 28, 2008 2:54 PM To: MS-Exchange Admin Issues Subject: Could someone tell me where i can find this setting in exchange 2003 WARNING: One or more of your mailservers is claiming to be a host other than what it really is (the SMTP greeting should be a 3-digit code, followed by a space or a dash, then the host name). If your mailserver sends out E-mail using this domain in its EHLO or HELO, your E-mail might get blocked by anti-spam software. This is also a technical violation of RFC821 4.3 (and RFC2821 4.3.1). Note that the hostname given in the SMTP greeting should have an A record pointing back to the same server. Note that this one test may use a cached DNS record. mx2.idfllc.com claims to be non-existent host idfmailprd01.idf.local: <br /> 220 idfmailprd01.idf.local ESMTP Service ready <br /> ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~ ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~
