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Thread: i need ur advice

  1. #1
    mahmoud is offline Senior Member
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    Default i need ur advice

    iam trying to install zimbra on centos platform finally i pass the errors of perl and that stuff but iam getting an error of dns :

    DNS ERROR - none of the MX records for :
    resolve to this host
    It is suggested that the MX record resolve to this host
    Re-Enter domain name? [Yes]

    my host file is as follows:
    127.0.0.1 localhost.localdomain localhost
    91.72.208.204 imap.gmail.com mail

    iam sure that something wrong on that file , the reason that my FQHN is imap.gmail.com is because i want to use zimbra mobile and i want to syncronize mails .

    iam sure iam missing something please clear to me that issue about the domain and dns i searched a lot in the wikis and the forums i didnot understand the logic.

    Regards and thanks in advance
    hint : i can send a full documentation about installing zimbra on centos iam sure it will add help to others as me myself i didnot been able to complete that installation except from the guidance from previous zimbra installers

  2. #2
    phoenix is online now Zimbra Consultant & Moderator
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    Default

    This error has been covered a million times (OK, I exegerate slightly), do a search for this problem and you'll get your answer. I am assuming that if you are behind a NAT router that you have a Split DNS set-up.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  3. #3
    petrocc is offline Junior Member
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    Quote Originally Posted by mahmoud View Post
    iam trying to install zimbra on centos platform finally i pass the errors of perl and that stuff but iam getting an error of dns :

    DNS ERROR - none of the MX records for :
    resolve to this host
    It is suggested that the MX record resolve to this host
    Re-Enter domain name? [Yes]

    my host file is as follows:
    127.0.0.1 localhost.localdomain localhost
    91.72.208.204 imap.gmail.com mail
    Oh my, where to start...

    Well, here for one: http://files.zimbra.com/website/docs...ck%20Start.pdf

    But I think your troubles are deeper than that guide will handle.

    An MX record is an artifact of the DNS system, and not something you can just make up out of thin air.

    If you don't understand DNS and MX records running an internet mailserver is going to be very, very confusing.

    iam sure that something wrong on that file , the reason that my FQHN is imap.gmail.com is because i want to use zimbra mobile and i want to syncronize mails .
    There is nothing wrong syntactically with that file, but it's not the place to solve your problem.

    imap.gmail.com is not *your* FQHN, it's Google's, and it's easily discoverable via DNS, so it doesn't go in your /etc/hosts file.

    In fact almost nothing related to Zimbra should go there (other than your local host's information, here is what is in mine:

    petro@mutiny:~$ cat /etc/hosts
    127.0.0.1 localhost
    72.20.110.147 mutiny.bounty.org mutiny

    But look at this:
    petro@minitrue:~$ host bounty.org
    bounty.org has address 208.82.247.252
    bounty.org mail is handled by 0 mutiny.bounty.org.

    Notice the mail is handled by line.

    This is the "MX" or Mail Exchanger record. Here's another one:
    petro@minitrue:~$ host gmail.com
    gmail.com has address 64.233.161.83
    gmail.com has address 64.233.171.83
    gmail.com has address 209.85.171.83
    gmail.com mail is handled by 5 gmail-smtp-in.l.google.com.
    gmail.com mail is handled by 10 alt1.gmail-smtp-in.l.google.com.
    gmail.com mail is handled by 10 alt2.gmail-smtp-in.l.google.com.
    gmail.com mail is handled by 50 gsmtp147.google.com.
    gmail.com mail is handled by 50 gsmtp183.google.com.


    Notice the multiple "is handled by" lines in this one, with increasing numbers.

    To keep from repeating what sites all over the internet will tell you, MX records point to machines (eventually) that handle email for a given host.

    You need to have whomever handles the nameserver for your host put an MX record in for you.

    iam sure iam missing something please clear to me that issue about the domain and dns i searched a lot in the wikis and the forums i didnot understand the logic.
    This may help you get started:

    An Introduction to DNS and DNS Tools

    This is an invaluable addition to your library:
    Amazon.com: DNS and BIND (5th Edition): Cricket Liu, Paul Albitz: Books

  4. #4
    mahmoud is offline Senior Member
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    Petrocc many thanks , the links you send was so usefull .
    zimbra is running now , i cannot describe how much iam happy , only one service not running which is MTA when i run zmcontrol status i found the postfix not running and i think i might go to split dns like phoenix said because at home everything running ok , at work the posfix not working because we are behind router i think i would go to split dns.

    Regards

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