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Thread: Email delivery reject, host unknown

  1. #1
    Wilson_Lee is offline Active Member
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    Default Email delivery reject, host unknown

    Hi , I 'm having a problem when sending mail to certain domain only. Their mail server seems to reject my mail.

    Here is the error:

    host mail.x.x.x.x said: 554 5.7.1
    <zimbra.xx.local>: Helo command rejected: Host not found (in reply to
    RCPT TO command)

    Do i need to change the hostname for the Zimbra server based on my actual domain?

    my actual domain is yy.com and mx record is mail.yy.com

    Now the setting in zimbra is zimbra.xx.local.

    My Zimbra version is opensource and version5. It is setup behind a NAT router and with split DNS configuration. my DNS setting is based on zone xx.local.
    Last edited by Wilson_Lee; 11-10-2011 at 04:28 PM.

  2. #2
    phoenix is offline Zimbra Consultant & Moderator
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    Default

    Quote Originally Posted by Wilson_Lee View Post
    Now the setting in zimbra is zimbra.xx.local.
    That's not a valid public domain name and is most likely what's causing your problem, you should have your valid domain name in there.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  3. #3
    Wilson_Lee is offline Active Member
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    Fyi, our DNS setting is hosted by external DNS server which maintain by vendor.

    And zimbra server also I hv setup a internal DNS. Will I change the setting of DNS solve this issue?

    Do I need to change the DNS setting (bind) as below to get rid the issue:

    1) setup another zone which contains our mail server domain

    2) update the host file and remove existing setting

    how about zimbra? Do i need to do anything? cause during setup time, my domain is xx.local and the hostname for server is zimbra.xx.local
    Last edited by Wilson_Lee; 11-11-2011 at 06:56 PM.

  4. #4
    phoenix is offline Zimbra Consultant & Moderator
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    You'll need to follow the instructions in the Split DNS article for configuring the DNS server and changing the hosts etc. files, you'll also need to change the server name - go to the wiki and search for the word "zmsetservername" (or you can also search the forums for that word).
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

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