I searched Google for change host name in ehlo exchange server and got the following from http://www.experts-exchange.com/ In exchange system manager ESM, Servers, <your server>, Protocols, SMTP. Right click on the SMTP VS and choose Properties. Click on the tab "Delivery" and then "Advanced". In the box labelled DNS enter what the server is known as on the internet On my exchange 2003 the box is labeled Fully-qualified domain name and not DNS but I believe it is the correct name. Enter the name that your server is known as on the internet. (MAIL.autosoldnow.com) I had the same issue with my email system. I don't think email was being blocked but when I checked out our information on that DNS web site I had the same warning about my mail servers claiming to be something different than what they are known as on the internet. They claimed to be what they are known as on our internal network. Now I have to figure out that SPF record thing. News to me. Douglas Jensen Douglas.Jensen@xxxxxxxxxxxxx <mailto:Douglas.Jensen@xxxxxxxxxxxxx> Voice (952) 402-9821 Fax (952) 402-9815 Network Administrator Scott Carver Dakota CAP Agency, Inc. 712 Canterbury Road Shakopee, MN 55379 www.capagency.org <file:///C:/Documents%20and%20Settings/djensen.SCDCAP/Application%20Data /Microsoft/Signatures/www.capagency.org> ________________________________ From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Andrew English Sent: Wednesday, May 17, 2006 10:14 AM To: exchangelist@xxxxxxxxxxxxx Subject: RE: [ExchangeList] Re: Reverse Lookup 2 How do go about fixing that? I didn't design the network originally, I just walked into it. Regards, Andrew ________________________________ From: exchangelist-bounce@xxxxxxxxxxxxx on behalf of Jensen, Douglas Sent: Wed 17/05/2006 10:10 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: Reverse Lookup 2 Your server is claiming to be asnmail.autosoldnow.local when it tries to send email. When the other email system tries to look up the ip address via a reverse dns lookup the ip address lookup returns mail.autosoldnow.com. These two names are clearly not the same so the other email server will think you are a spammer. You need your exchange server to claim it is mail.autosoldnow.com when it tries to send mail not asnmail.autosoldnow.local 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 <http://www.dnsstuff.com/pages/rfc821.htm> 4.3 (and RFC2821 <http://www.dnsreport.com/tools/rfc.ch?detail=2821> 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. MAIL.autosoldnow.com claims to be non-existent host ASNMAIL.autosoldnow.local: 220 ASNMAIL.autosoldnow.local Microsoft ESMTP MAIL Service, Version: 6.0.3790.1830 ready at Wed, 17 May 2006 10:04:59 -0400 Douglas Jensen Douglas.Jensen@xxxxxxxxxxxxx <mailto:Douglas.Jensen@xxxxxxxxxxxxx> Voice (952) 402-9821 Fax (952) 402-9815 Network Administrator Scott Carver Dakota CAP Agency, Inc. 712 Canterbury Road Shakopee, MN 55379 www.capagency.org <file:///C:/Documents%20and%20Settings/djensen.SCDCAP/Application%20Data /Microsoft/Signatures/www.capagency.org> ________________________________ From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Andrew English Sent: Wednesday, May 17, 2006 8:37 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: Reverse Lookup 2 Can someone check to see if autosoldnow.com reverse lookup is properly configured? It says on dnsstuff, and dnsreport that reverse lookup works but that it points to mail.autosoldnow.com, when I look up my other mail servers most of them point to there-IP.providername.com I am asking because emails are still backing up in Exchange. :( Regards, Andrew