We are not looking at an NDR. We are looking at the results of some outside testing. What looks like a testing website saying your server is not identifing itself upon connection properly.
His server acknowledges the connection to incoming email with: 220 idfmailprd01.idf.local ESMTP Service ready > -----Original Message----- > From: Stephan Barr [mailto:[EMAIL PROTECTED] > Sent: Monday, January 28, 2008 4:03 PM > To: MS-Exchange Admin Issues > Subject: RE: Could someone tell me where i can find this setting in > exchange 2003 > > 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 ~ ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~
