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URGENT: how to check rdns enabled???

Discussion in 'Bind / DNS / Nameserver Issues' started by martekbiz, Mar 22, 2004.

  1. martekbiz

    martekbiz Member

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    Hi All,

    I'm having problems with a new server I just bought.

    Email sent from webmail would not arrive at certain domains. Sends fine to hotmail.

    At first it was tohught to be that rdns was not enabled. A support ticket was issued and processed, saying it was enabled last night.

    problem? I STILL can't send to certain domains.

    I NEED to have this fixed prior to transfering accounts over. How do I check to ensure rdns was enabled and if it was... WHAT ELSE could it be?

    Thanks!!I appreciate it!

    A
     
  2. chirpy

    chirpy Well-Known Member

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    You can check rDNS is setup by simply doing a DNS lookup on the in-addr.arpa IP entry.

    In windows:
    nslookup 11.22.33.44

    On Linux:
    host 11.22.33.44

    Where 11.22.33.44 is your IP address.

    Note: It's usually best that you do not do the lookups above on a workstation/server that actually uses the DNS servers for the rDNS server itself if you're running DNS on that server (i.e. don't do it on the actual server or any workstation with its name servers set to use that server) otherwise it may incorrectly tell you that all is OK.
     
  3. martekbiz

    martekbiz Member

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    I found a tool that did this and it appears that RDNS was indeed setup.

    What the hell could be the problem then? *sighs*

    Aaron

    P.S. thanks for replying :)
     
  4. chirpy

    chirpy Well-Known Member

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    Are you getting any bounce messages for the failed emails?

    If you could post one here (replace any identifying information) it would be of help.

    The other thing you could do, is have a look in /var/log/exim_rejectlog for information on error messages for bounced email.
     
  5. martekbiz

    martekbiz Member

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    This is the bounce I am getting:

    Date: 3/22/2004 14:03:27 -0500
    From: Mail Delivery System <Mailer-Daemon@tom.xxx.com>
    To: martekho@tom.xxx.com
    Subject: Mail delivery failed: returning message to sender All headers
    This message was created automatically by mail delivery software.

    A message that you sent could not be delivered to one or more of its
    recipients. This is a permanent error. The following address(es) failed:

    aaronjw@xxx.com
    SMTP error from remote mailer after RCPT TO:<aaronjw@xxx.com>:
    host mailin2.korax.net [216.201.96.56]: 554 <martekho@tom.xxx.com>:
    Sender address rejected: Domain not found

    ------ This is a copy of the message, including all the headers. ------

    Return-path: <martekho@tom.xxx.com>
    Received: from martekho by tom.xxx.com with local (Exim 4.30)
    id 1B5Uhg-0008Im-RF
    for aaronjw@xxx.com; Mon, 22 Mar 2004 14:03:16 -0500
    From: "Test" <info@xxx.com>
    To: aaronjw@xxx.com
    Subject: aaaaaaa!!!
    X-Mailer: NeoMail 1.26
    X-IPAddress: 65.95.157.28
    MIME-Version: 1.0
    Content-Type: text/plain; charset=iso-8859-1
    Message-Id: <E1B5Uhg-0008Im-RF@tom.xxx.com>
    Date: Mon, 22 Mar 2004 14:03:16 -0500


    --
    help me out here!!!!
     
  6. chirpy

    chirpy Well-Known Member

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    Aha!

    Do you have a DNS entry for "tom.xxx.com" setup? I not, then that is where your problem is. The remote SMTP server is trying to lookup the IP address for tom.xxx.com and cannot find one and so is rejecting the email.
     
  7. Website Rob

    Website Rob Well-Known Member

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    It would be good to first find out if the Domain name resolves.
     
  8. martekbiz

    martekbiz Member

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    Hi all!

    First off.. thanks to everyone who replied with suggestions. I'm sorry I waisted your time :(

    The problem is resolved and it was actually a hostname problem.

    All is working now and once again... thanks to all and sorry for waisting your time with a silly problem.

    Aaron
     
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