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Thread: Remote mail server and Reverse DNS errors

  1. #1
    Join Date
    Apr 2007
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    76

    Remote mail server and Reverse DNS errors

    I am using a second DA machine to act as a mail server for one of my domains. I have the A record set to redirect to the mail server, and generally mail is operating properly.
    However, we are seeing a lot of 550 errors with mail being rejected due to a lack of Reverse DNS records.

    I am trying to set up PTR records for the domain on the mail server, but can find little available to assist in getting it right.

    Currently the primary server where the site resides is at 12.46.47.201
    The mail server is at 65.18.198.93

    I understand the PTR record should look something like:
    201.46.47.12.in-addr.arpa. PTR www.domainname.com.

    Or is it 93.198.18.65.in-addr.arpa. PTR www.domainname.com.?


    Can anyone tell me what I am doing wrong here?

    Thanks in advance.....
    Last edited by srqwebguy; 10-09-2012 at 10:08 AM.

  2. #2
    Join Date
    Aug 2008
    Posts
    4,697
    Unless your isp has delegated your reverse dns authority you cannot set ptr records. Most of the time you have to contact your hosting provider to set a ptr record.

    Is this your company or your hosting provider.

    198.18.65.in-addr.arpa. 86400 IN NS NS2.HOST4U.NET.
    198.18.65.in-addr.arpa. 86400 IN NS NS.HOST4U.NET.

  3. #3
    Join Date
    Apr 2007
    Posts
    76
    That is our hosting provider for that machine. I will contact them. Thanks.

  4. #4
    Join Date
    Jun 2003
    Location
    California
    Posts
    26,123
    Quote Originally Posted by srqwebguy View Post
    II have the A record set to redirect to the mail server, and generally mail is operating properly.
    Mail is not directed by A records, but rather by MX records.

    Jeff
    +1 951 643-5345
    Third-Party DirectAdmin administration and support
    Dedicated Servers, Dedicated Reseller Accounts
    NoBaloney Internet Services div. Qnito Incorporated
    848 North Rainbow Blvd., Suite #3789
    Las Vegas, NV 89107-1103

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