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Thread: Client Host Rejected

  1. #1
    fathianf is offline Intermediate Member
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    Default Client Host Rejected

    Hi, I am running zimbra for more than 5 years, and recently I receive the following error for some important places such as ubc university in canada.
    host mailer.chbe.ubc.ca[137.82.115.234] said: 554 5.7.1
    <alumni.iut.ac.ir[217.219.19.33]>: Client host rejected: Access denied (in
    reply to RCPT TO command)
    My mail server Ipaddress is: 217.219.19.33
    zimbra is installed on mta.iut.ac.ir
    I have more than 15 virtual domain such as cc.iut.ac.ir.
    I have one mx and A record for mta.iut.ac.ir
    and A record for all subdomains.
    would you please let me know what is wrong with my config that I get above error.

  2. #2
    mavlenko is offline Active Member
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    Hi,
    you need to contact with admin of mailer.chbe.ubc.ca for more details of error "Client host rejected: Access denied".
    Do you know that your address 217.219.19.33 is blacklisted in some DNSBL's?

    blackholes.five-ten-sg.com listed
    dnsbl-2.uceprotect.net listed
    dnsbl-3.uceprotect.net listed

    maybe mailer.chbe.ubc.ca use it for his spamcheck?
    Last edited by mavlenko; 02-14-2011 at 12:41 AM.

  3. #3
    phoenix is offline Zimbra Consultant & Moderator
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    Please update your forum profile with the output of the following command (do not post the output in this thread):

    Code:
    zmcontrol -v
    In addition to the comments above you also have a problem with your DNS records - there are multiple MX records with the same priority that have different IP addresses associated with them. Using the same priority means a reply to one specific server may end-up at another (incorrect) server which, as far as I can tell, has a different mail server running on it.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  4. #4
    fathianf is offline Intermediate Member
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    I have upgraded my forum profile, please help me as I am really confused about my configuration in DNS and zimbra

  5. #5
    phoenix is offline Zimbra Consultant & Moderator
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    Quote Originally Posted by fathianf View Post
    I have upgraded my forum profile, please help me as I am really confused about my configuration in DNS and zimbra
    Why are you confused? I've already outlined the problem and mavlenko has told you what to do about being blacklisted.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  6. #6
    mavlenko is offline Active Member
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    In addition, I just run a commands
    dig MX mta.iut.ac.ir
    and
    dig MX cc.iut.ac.ir
    and no one MX records was returned. I think you have some problem with your DNS provider. It's not a zimbra problem.

    # dig MX mta.iut.ac.ir

    ; <<>> DiG 9.3.1 <<>> MX mta.iut.ac.ir
    ;; global options: printcmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 58784
    ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

    ;; QUESTION SECTION:
    ;mta.iut.ac.ir. IN MX

    ;; AUTHORITY SECTION:
    iut.ac.ir. 3600 IN SOA ns.iut.ac.ir. khademi.cc.iut.ac.ir. 2011021501 3600 3600 1814400 3600


    # dig MX cc.iut.ac.ir

    ; <<>> DiG 9.3.1 <<>> MX cc.iut.ac.ir
    ;; global options: printcmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3262
    ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

    ;; QUESTION SECTION:
    ;cc.iut.ac.ir. IN MX

    ;; AUTHORITY SECTION:
    iut.ac.ir. 3298 IN SOA ns.iut.ac.ir. khademi.cc.iut.ac.ir. 2011021501 3600 3600 1814400 3600

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