Hello,I just had to migrate ISPs and realized I am having an issue with reverse lookup on my exchange. I am still learning exchange and DNS. I am trying to determine how to configure DNS to allow for my exchange server to be found. I have two domains, PEG20XX.com (Internal) and PEGASXXX.com (External). I thought I knew how to configure a PTR record to point to my internal domain, however I found out I was wrong. Can anyone point me in the right direction? Please let me know if I need to elaborate more.Thank youMCTS; MCDST;

Refer below similar thread... http://social.technet.microsoft.com/Forums/en-US/exchangesvrtransport/thread/66acbf6d-7f02-42ac-99b7-f2c0449c1d69Amit Tank | MVP Exchange Server | MCITP: EMA | MCSA: M | http://ExchangeShare.WordPress.com

well that post did help. I think I have made some progress. I am now able to the untrusted side of my firewall using my exchanges FQDN. However, am I supposed to put a rule into the firewall to tell it where to send this traffic? Also I am still unable to us the NS lookup tool with my IP address to resolve to my exchange.Thank you for your help!MCTS; MCDST;

Hi, I would like to explain that you should create PTR record for your external domain (email domain). In addition, you should create PTR record on Public DNS server instead of internal DNS server. I would like to explain if the remote mail server needs to perform RDNS, it will query the Public DNS server based on your Public IP address. Regarding use NSLooup to check PTR record, you can use following method: 1. Start->cmd 2. Type nslookup 3. Type Sever Public DNS Server IP 4. Type set type=ptr 5. Type Public IP Address Mike Shen TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com

Call your ISP provider who has provided the Pool of IP's which you have used for creating a External host record for MX (Public mail access) ans ask them to cretae a ptr record for that IP, provide them with the Host name and the IP associated to it.PTR records can only be cretaed by the ISP provider from which you have buyed the Public IP's.Ex:Ip 202.3.4.4Host (A) record: MX1.PEGASXXX.comIP 202.3.4.4 is assigned to MX1.PEGASXXX.comWhen you NSLOOKUPSet q=mxpegasxxx.comQuery returns with the Host(A) record which is used for MX record, that is MX1.PEGASXXX.comThan Set q=aMX1.PEGASXXX.comQuery return with the associated IP to that host recordMX1.PEGASXXX.com 202.3.4.4For ptrSet q=ptr202.3.4.4If not cretaed it shows your ISP providers host name or nothing.Any doughts please let us know..

Mike and RockSlow,Sorry for the delayed reply, I have been busy with lots of projects. Either way I have not been able to resolve this.I called AT&T and had them delegate my IP address range to my webhost (hostmysite.com) in an attempt to have my webhost create a PTR record for my domain. However, my webhost is stating they are unable to do so. I just sent myself a test message from my internal email to my outside personal email. When I did this I got the following in the header:Delivered-To: Mypersonalemail@gmail.comReceived: by 10.231.147.199 with SMTP id m7cs22646ibv; Thu, 17 Sep 2009 08:19:45 -0700 (PDT)Received: by 10.224.52.94 with SMTP id h30mr357111qag.348.1253200784187; Thu, 17 Sep 2009 08:19:44 -0700 (PDT)Return-Path: <xxx@pegasuscu.com>Received: from PEGEXCH.peg2XXX.com ([12.69.XX.2]) by mx.google.com with ESMTP id 12si470324ywh.56.2009.09.17.08.19.43; Thu, 17 Sep 2009 08:19:44 -0700 (PDT)Received-SPF: error (google.com: error in processing during lookup of xxx@pegasuscu.com: DNS timeout) client-ip=12.69.XX.2;Authentication-Results: mx.google.com; spf=temperror (google.com: error in processing during lookup of rexum@pegasuscu.com: DNS timeout) smtp.mail=xxx@pegasuscu.comContent-class: urn:content-classes:messageMIME-Version: 1.0Content-Type: text/plain;charset="iso-8859-1"Content-Transfer-Encoding: quoted-printableX-MimeOLE: Produced By Microsoft Exchange V6.5Subject: TESTDate: Thu, 17 Sep 2009 10:18:05 -0500Message-ID: <74462319FEDB8144BE21A88F879989EFFD3738@PEGEXCH.peg2XXX.com>X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: TESTThread-Index: Aco3qg27jUXZIJ0IQ/qhul1dROZICw==From: "Ryker" <XXX@pegasuscu.com>To: <mypersonalemail@gmail.com>As you can see, I have an external domain (pegasuscu.com) and an internal domain (peg2XXX.com). It seems this is one point in which I am hanging up. I have created a "masquerade domain" record on the default exchange SMTP virtual server.(Changing pegexch.peg2XXX.com to pegexch.pegasuscu.com)Which I thought should reflect on my outbound email. However it does not seem that this is correct?I have the SMTP FQDN set internally to pegexch.peg2XXX.com and a smart host set to mail.global.frontbridge.com (my email spam filtering service). I do not have any external DNS servers set within this "advanced" window.So it seems I may have two issues, one being that my domain is not being masqueraded properly and second I do not have reverse DNS working at this point.I really do appreciate all of your help, as I would rather learn how to do this than to just pay someone to fix it and never really know the whole answer.Take care,Ryker MCTS; MCDST;