Reverse DNS SBS 2003 One More Time Please

Posted on 2012-03-18
Medium Priority
Last Modified: 2012-03-21
Hello All,

I have a SBS 2003 network and apparently I need to set up reverse DNS.  I have read many of the past posts, and would like a little more clarification for my situation.  Here is my schema.

SBS 2003 standard, Exchange FQDN when I telnet is “company.com,”  Public DNS MX record is “mail.company.com” (do these need to be the same and how do I make the change on the server if necessary?), ISP is Time Warner, DNS set up by me through ixwebhost.com, I have a single static IP address that resolves to my server, the is a “company.com” website with a different IP address.

Please provide instructions on how I should implement reverse DNS and in what order I should make changes.  I am familiar with SBS and DNS and understand the concept behind reverse DNS, but would like specific instructions on what to do.

Thank you all very much for reading this post and for your help.  Please do not just post a couple URLs, I would really appreciate some instructions.  Thank you again for your time.     eric
Question by:-ewass-
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LVL 77

Accepted Solution

Rob Williams earned 2000 total points
ID: 37736149
You cannot set up reverse DNS. Whoever assigns you the public IP, usualy the ISP, has to set up reverse DNS for you. You would want the IP to point to mail.company.com since that is the FQDN of your mail server.

Author Comment

ID: 37736157
Thank you for your quick response,

when I telnet to my server on port 25 it answers as "company.com" not "mail.company.com" is this an issue?

LVL 77

Assisted Solution

by:Rob Williams
Rob Williams earned 2000 total points
ID: 37736177
That can be a problem with some recipients. Test with www.mxtoolbox.com  using your domain name, and then in the results click test SMTP.  If it shows "Reverse DNS does not match SMTP Banner" then you can change from company.com to mail.company.com by following the instructions in the link below under; "Configure SMTP banner Exchange 2003"
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Author Comment

ID: 37736239
Thank you for your tests and instructions.  I ran the test and it said "Warning - Reverse DNS does not match SMTP Banner" so I followed the instructions and changed the banner name.  I ran the tool again and received the same error, however it seemed to have recognized the change in the name.  I tried it several times and double checked.  The url is leisure-lift.com and you will find that the mail server is mail.leisure-lift.com would you please try it yourself and see if you can come up with an explanation.
LVL 77

Expert Comment

by:Rob Williams
ID: 37736251
If you don't have reverse DNS set up yet it would also show as different.

Author Comment

ID: 37736282
OK, I will call them tomorrow and get back to you asap.  Thanks for your help so far.  eric

Author Closing Comment

ID: 37747291
Thank you for your quick response.

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