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Thread: Some Mails are bouncing back

  1. #1
    nmsalert10 is offline Member
    Join Date
    Dec 2010
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    Default Some Mails are bouncing back

    We have Zimbra 7.1 GA NE.

    Mails to certain domains are bouncing back with error;

    I'm sorry to have to inform you that your message could not be delivered to
    one or more recipients. It's attached below.

    For further assistance, please send mail to postmaster.

    If you do so, please include this problem report. You can delete your own
    text from the attached returned message.

    The mail system

    <sridhar.iyer@nilgiris1905.com>: host mx1.mailhostbox.com[70.87.29.2] said:
    450-4.7.1 Client host rejected: cannot find your reverse hostname,
    [xx.xx.xx.xx] 450 4.7.1 Please see
    Various SMTP error codes explained | Email Help Center
    for
    explanation of the problem. (in reply to RCPT TO command)

    We have asked our ISPs to add the reverse DNS and they have updated that it's been added.

    What is the exact issue?

    By the way the IP we are using is xx.xx.xx.21 for mail server but in the error log it is displaying different public IP address xx.xx.xx.18. We don't have a clue on what is happening here?

    Please can someone advice

  2. #2
    phoenix is offline Zimbra Consultant & Moderator
    Join Date
    Sep 2005
    Location
    Vannes, France
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    23,582
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    Default

    Quote Originally Posted by nmsalert10 View Post
    Please can someone advice
    Posting an 'it doesn't work' type of post isn't very helpful, you've effectively given no details with which to diagnose the problem. In any case, you already have all the information you need to fix this problem and it's not a Zimbra problem. You need a reverse DNS for your public IP address and if you see the wrong IP for your mail server in the log files then you have a DNS problem that needs fixing.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  3. #3
    nmsalert10 is offline Member
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    Default

    Hello Phoenix,

    ISPs have updated us that RDNS entries have been added.

    When we look at /var/log/messages,

    Apr 6 14:39:42 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '63.148.30.78.in-addr.arpa/PTR/IN': 202.54.12.164#53
    Apr 6 14:39:43 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'dynamic-78-30-148-63.adsl.eunet.rs/A/IN': 202.54.12.164#53
    Apr 6 14:39:44 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '63.148.30.78.sbl.spamhaus.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:44 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '63.148.30.78.dnsbl.njabl.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:46 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '63.148.30.78.relays.mail-abuse.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:46 zmsa named[7007]: network unreachable resolving '63.148.30.78.relays.mail-abuse.org/A/IN': 2001:503:ba3e::2:30#53
    Apr 6 14:39:47 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '63.148.30.78.cbl.abuseat.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:49 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'koovs.com/MX/IN': 202.54.12.164#53
    Apr 6 14:39:49 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '63.148.30.78.cbl.abuseat.org/TXT/IN': 202.54.12.164#53
    Apr 6 14:39:49 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'blns.bofh.it/AAAA/IN': 202.54.12.164#53
    Apr 6 14:39:49 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'blns.bofh.it/A/IN': 202.54.12.164#53
    Apr 6 14:39:49 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'b232-83.smtp-out.amazonses.com/TYPE99/IN': 202.54.12.164#53
    Apr 6 14:39:50 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'b232-83.smtp-out.amazonses.com/TXT/IN': 202.54.12.164#53
    Apr 6 14:39:50 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'amazonses.com/TYPE99/IN': 202.54.12.164#53
    Apr 6 14:39:50 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'amazonses.com/TXT/IN': 202.54.12.164#53
    Apr 6 14:39:50 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'exilant.com/MX/IN': 202.54.12.164#53
    Apr 6 14:39:55 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '50.62.151.17.in-addr.arpa/PTR/IN': 202.54.12.164#53
    Apr 6 14:39:55 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'mail-out.apple.com/A/IN': 202.54.12.164#53
    Apr 6 14:39:55 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'exilant.com.rhsbl.ahbl.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:55 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'exilant.com/A/IN': 202.54.12.164#53
    Apr 6 14:39:55 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'exilant.com.fulldom.rfc-ignorant.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:55 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '_adsp._domainkey.exilant.com/TXT/IN': 202.54.12.164#53
    Apr 6 14:39:56 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '131.10.0.10.in-addr.arpa/PTR/IN': 202.54.12.164#53
    Apr 6 14:39:56 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '50.62.151.17.sbl.spamhaus.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:57 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '50.62.151.17.dnsbl.njabl.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:57 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '50.62.151.17.relays.mail-abuse.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:57 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '50.62.151.17.cbl.abuseat.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '237.1.16.172.in-addr.arpa/PTR/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '70.176.168.17.combined.njabl.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '94.115.128.17.combined.njabl.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '52.113.128.17.combined.njabl.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '50.62.151.17.combined.njabl.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '70.176.168.17.bl.spamcop.net/TXT/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '94.115.128.17.bl.spamcop.net/TXT/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '52.113.128.17.bl.spamcop.net/TXT/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '50.62.151.17.bl.spamcop.net/TXT/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '50.62.151.17.zen.spamhaus.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '50.62.151.17.dnsbl.sorbs.net/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '70.176.168.17.dnsbl.sorbs.net/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '94.115.128.17.dnsbl.sorbs.net/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '52.113.128.17.dnsbl.sorbs.net/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '50.62.151.17.bl.score.senderscore.com/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '50.62.151.17.psbl.surriel.com/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '50.62.151.17.list.dnswl.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '50.62.151.17.bb.barracudacentral.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '50.62.151.17.sa-trusted.bondedsender.org/TXT/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '70.176.168.17.zen.spamhaus.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '94.115.128.17.zen.spamhaus.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '94.115.128.17.bb.barracudacentral.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '52.113.128.17.bb.barracudacentral.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '50.62.151.17.iadb.isipp.com/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'mail-out.apple.com/TYPE99/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '52.113.128.17.zen.spamhaus.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '70.176.168.17.bb.barracudacentral.org/A/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '50.62.151.17.sa-accredit.habeas.com/TXT/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'mail-out.apple.com/TXT/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'exilant.com/TYPE99/IN': 202.54.12.164#53
    Apr 6 14:39:58 zmsa named[7007]: unexpected RCODE (REFUSED) resolving 'exilant.com/TXT/IN': 202.54.12.164#53
    Apr 6 14:40:02 zmsa named[7007]: unexpected RCODE (REFUSED) resolving '60.11.10.10.in-addr.arpa/PTR/IN': 202.54.12.164#53


    Do we need to add/ modify anything in the BIND.

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