Question

MS Exchange SMTP reverse lookups

Asked by: d4nnyo

We need to tell our new ISP to setup a PTR so that email outbound from our mail server is not blocked by reverse lookups on the recipient side.

I have the IP for the mail server, but how do I find the correct domain name for this? Where is this located in MS Exchange System Manager? Here's where I'm looking:

Protocols/SMTP/Default SMTP Virtual Server/Properties/Delivery [tab]/Advanced...

In this window I have a fully-qualified valid domain name. Is this what I give the ISP for the PTR?

This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.

Subscribe now for full access to Experts Exchange and get

Instant Access to this Solution

  • Plus...
  • 30 Day FREE access, no risk, no obligation
  • Collaborate with the world's top tech experts
  • Unlimited access to our exclusive solution database
  • Never be left without tech help again

Subscribe Now

Asked On
2009-07-01 at 11:36:03ID24537324
Topics

Windows NT Networking

,

Server Applications

Participating Experts
2
Points
500
Comments
4

Trusted by hundreds of thousands everyday for fast, accurate and reliable tech support.

  • "The time we save is the biggest benefit of Experts Exchange to Warner Bros. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange." Mike Kapnisakis, Warner Bros.
  • "Our team likes having a resource that is more secure than just using Google and most experts using this service really know their stuff. It's nice to look here first versus using Google." Dayna Sellner, Lockheed Martin
  • "Anytime that I've been stumped with a problem, 9 out of 10 times Experts Exchange has either the accepted solution or an open discussion of the potential solution to the problem." Kenny Red, eBay Inc.

See what Experts Exchange can do for you.

Got a question?

We've got the answer.

Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.

Screenshot of Experts Exchange Knowledgebase

Need individual assistance?

Our experts are ready to help.

If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.

Screenshot of Experts Exchange Knowledgebase

Want to learn from the best?

Read articles from industry experts.

Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.

Screenshot of an Article

Working on a long term project?

Store your work and research.

Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.

Screenshot of Experts Exchange Knowledgebase

Access the answers to your technology questions today.

Subscribe Now

30-day free trial. Register in 60 seconds.

What Makes Experts Exchange Unique?

Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.

Trusted by the world's most respected brands.

image of each brand's logo

Faithfully serving IT professionals since 1996.

Experts Exchange Logo

Try it out and discover for yourself.

Subscribe Now

30-day free trial. Register in 60 seconds.

Related Solutions

  1. SMTP timeouts
    Hi Everyone, I have been struggling with this issue for a few days and can't seem to come up with an explanation. Exchange 2000 server -SMTP virtual server allowing internet mail delivery -anonymous access -no relaying -smart host for remote delivery Outboung mail works fi...
  2. SMTP protocol, PTR
    Jun 16 09:23:25 mxgate22 sendmail[22222]: [ID 111111 mail.notice] i5GENPV22222: ruleset=check_relay, arg1=[200.200.200.200], arg2=200.200.200.200, relay=[200.200.200.200], reject=550 5.7.1 Access temporarily denied. IP name lookup failed [200.200.200.200] Please see http:/...
  3. SMTP Virtual Server delivery failures
    In my DMZ I have a Windows 2003 server using the Default SMTP Virtual Server in IIS v6.0 to act as an SMTP relay for Exchange. (The server does not have Exchange installed) A couple of time a day I get mail delivery failures to the outside world. The system log has the fol...
  4. OutBound SMTP problem
    I have Windows SMTP server that will accept in bound mail but will not deliver outbound mail unless i restart SMTP service . E-mail with attachments do no get delivered no matter what I do the just sit in the mail queue c:\inetpub\mailroot\queue Ip external IP address is f...

Free Tech Articles

  1. WARNING: 5 Reasons why you should NEVER fix a computer for free.
    It is in our nature to love the puzzle. We are obsessed. The lot of us. We love puzzles. We love the challenge. We thrive on finding the answer. We hate disarray. It bothers us deep in our soul. W...
  2. SCCM OSD Basic troubleshooting
    SCCM 2007 OSD is a fantastic way to deploy operating systems, however, like most things SCCM issues can sometimes be difficult to resolve due to the sheer volume of logs to sift through and the dispe...
  3. Migrate Small Business Server 2003 to Exchange 2010 and Windows 2008 R2
    This guide is intended to provide step by step instructions on how to migrate from Small Business Server 2003 to Windows 2008 R2 with Exchange 2010. For this migration to work you will need the fo...
  4. Create a Win7 Gadget
    This article shows you how to create a simple "Gadget" -- a sort of mini-application supported by Windows 7 and Vista. Gadgets can be dropped anywhere on the desktop to provide instant information, ...
  5. Outlook continually prompting for username and password
    There have been a lot of questions recently regarding Outlook prompting for a username and password whilst using Exchange 2007. There are a few reasons why this would happen and I will try to cover t...
  6. Backup Exchange 2010 Information Store using Windows Backup
    There seems to be quite a lot of confusion around the ability to backup Exchange 2010 using the built in Windows Backup feature. This stems from the omission of this feature prior to Exchange 2007 s...

Cloud Class Webinars

  1. Avoiding Bugs in Microsoft Access
    Alison Balter takes and in-depth look at avoiding bugs in Access. In this webinar you will learn about using the immediate window to debug your applications, invoking the debugger, using breakpoints to troubleshoot, stepping through code, setting the next statement to execute, ...
  2. Top 10 Best New Features in Visio 2010
    Scott Helmers gives live demonstrations of the top 10 new features in Visio 2010. This webinar will teach you how to create compelling diagrams by adding shapes to the page with a single click, linking the shapes in a diagram to data in Excel (or SQL Server, or SharePoint), ...
  3. IT Consultant Business Secrets Revealed
    Michael Munger, Experts Exchange tech pro and IT consultant, pulls back the curtain on his very successful businesses and answers question on every IT consultant and business owner should know about. He shares secrets on what he did to solve the 5 most common problems in IT, ...
  4. Disaster Recovery and Business Continuity
    Quest CTO, Mike Billon, gives an overview of the steps involved in building a dunamic disaster recovery plan. Through case studies and an examination of software/hardware tooles for monitoring and testing, you'll gain a better understandin of where you are, where you want ...
  5. Organize Your Visio Diagrams with Containers and Lists
    Scott Helmers uses cross functional flowcharts, wireframe diagrams, data graphic legends and seating charts to teach you: how to ustilize all three new structured diagram components in Visio 2010, the best practices for organizeing shapes in previous version of Visio, how to organize ...
  6. How to Us Objects, Properties, Events and Methods in Microsoft Access
    Alison Dalter gives an in-depbth look at objects, properties, events and methods in Microsoft Access. In this webinar you will learn about using the object browser, referring to objects, working with properties and methods, working with object variables, understanding the ...

Join the Community

Give a Little. Get a Lot.

Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.

Join the Community

Answers

 

by: IT-Monkey-DavePosted on 2009-07-01 at 11:45:55ID: 24757000

All the ISP should need is the external FQDN for the mail server.  Like "exchange.yourdomain.com".  You can determine that name by doing a Dig or nslookup of the MX record for your domain.  And of course they need the public IP address.

 

by: d4nnyoPosted on 2009-07-01 at 12:44:23ID: 24757484

Thanks for the response. We're using an anti-spam filtering service (Appriver), so the MX record is no use.

But check out this long header from a message from that server:

      From:       dob@somedomain.com
      Subject:       Test from MMG
      Date:       July 1, 2009 2:37:26 PM EDT
      To:       daniel@otherdomain.com
      Return-Path:       <dob@somedomain.com>
      Delivered-To:       daniel@otherdomain.com
      Received:       (qmail 24143 invoked by uid 80); 1 Jul 2009 18:37:29 -0000
      Received:       from unknown (HELO mx21.registeredsite.com) (66.97.46.21) by 209.237.134.180 with SMTP; 1 Jul 2009 18:37:29 -0000
      Received:       from exchserver.thirddomain.com (gateway.somedomain.com [66.x.x.x]) by mx21.registeredsite.com (8.12.11.20060308/8.12.11) with ESMTP id n61IbSua023612 for <daniel@otherdomain.com>; Wed, 1 Jul 2009 14:37:28 -0400
      Content-Class:       urn:content-classes:message
      Mime-Version:       1.0
      Content-Type:       text/plain; charset="iso-8859-1"
      Content-Transfer-Encoding:       quoted-printable
      X-Mimeole:       Produced By Microsoft Exchange V6.5
      Message-Id:       <2F37D3D97D092347A6EF8274BF37DA7795D7D1@exchserver.thirddomain.com>
      X-Ms-Has-Attach:       
      X-Ms-Tnef-Correlator:       
      Thread-Topic:       Test from MMG
      Thread-Index:       Acn6evrvKd0IGmQjSaiqNCas9VcCZQ==
      X-Spamscore:       0
      X-Mailhub-Apparently-To:       daniel@otherdomain.com

Based on this, I'm guessing that we want the PTR record setup for gateway.otherdomain.com -- correct?

Thanks much!

- DOB

 

by: d4nnyoPosted on 2009-07-01 at 12:45:57ID: 24757501

CORRECTION - PLEASE DISREGARD ABOVE POST

d4nnyo:
Thanks for the response. We're using an anti-spam filtering service (Appriver), so the MX record is no use.

But check out this long header from a message from that server:

      From:       dob@somedomain.com
      Subject:       Test from MMG
      Date:       July 1, 2009 2:37:26 PM EDT
      To:       daniel@otherdomain.com
      Return-Path:       <dob@somedomain.com>
      Delivered-To:       daniel@otherdomain.com
      Received:       (qmail 24143 invoked by uid 80); 1 Jul 2009 18:37:29 -0000
      Received:       from unknown (HELO mx21.registeredsite.com) (66.97.46.21) by 209.237.134.180 with SMTP; 1 Jul 2009 18:37:29 -0000
      Received:       from exchserver.thirddomain.com (gateway.somedomain.com [66.x.x.x]) by mx21.registeredsite.com (8.12.11.20060308/8.12.11) with ESMTP id n61IbSua023612 for <daniel@otherdomain.com>; Wed, 1 Jul 2009 14:37:28 -0400
      Content-Class:       urn:content-classes:message
      Mime-Version:       1.0
      Content-Type:       text/plain; charset="iso-8859-1"
      Content-Transfer-Encoding:       quoted-printable
      X-Mimeole:       Produced By Microsoft Exchange V6.5
      Message-Id:       <2F37D3D97D092347A6EF8274BF37DA7795D7D1@exchserver.thirddomain.com>
      X-Ms-Has-Attach:      
      X-Ms-Tnef-Correlator:      
      Thread-Topic:       Test from MMG
      Thread-Index:       Acn6evrvKd0IGmQjSaiqNCas9VcCZQ==
      X-Spamscore:       0
      X-Mailhub-Apparently-To:       daniel@otherdomain.com

Based on this, I'm guessing that we want the PTR record setup for gateway.somedomain.com -- correct?

Thanks much!

- DOB

 

by: MesthaPosted on 2009-07-01 at 15:51:43ID: 24758989

Exchange has nothing to do with the host name used. You can use anything you like.
The PTR record needs to resolve. Therefore if you have gateway.example.com setup to point to your Exchange server, then that is what you would set as the PTR record. You would also set it on the SMTP virtual server.

However, can you not relay email out through the antispam server? That will ensure that you can put the restrictions in place that they require and not have problems with servers that call back to ensure you are an SMTP server.

Simon.

20120131-EE-VQP-002

3 Ways to Join

30-Day Free Trial

The Experts

98% positive feedback on 31,087 answers since March 2000. angeliii is a Microsoft Most Valuable Professional for his work with MS SQL Server & Develoment.

He has also proven his knowledge of Visual Basic Programming, PHP Scripting and Oracle Databases.

The Experts

97% positive feedback on 10,752 answers since July 2000. lrmoore has more than 18 years experience in the networking industry.

The six-time Mircosoft MVPs specialties include firewalls, virtual private networking, and network management.

Testimonials

"...and excellent source for support... Kind of like having your very own IT dept." Electriciansnet

Testimonials

"I was apprehensive at signing up at first. However... it has already made my life as an IT administrator much easier." JaCrews

Testimonials

"WOW! You guys have great, active, and knowledgeable people on here." moore50

Business Clients

Business Clients

In the Press

"If you’ve got a question... Experts Exchange can supply an answer.”

In the Press

"...an invaluable aid for both IT professionals and those who require tech support."

In the Press

"where IT professionals provide quick answers on just about any topic"

Business Account Plans

Loading Advertisement...