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Thread: Bakup MTA with Zimbra Open Source

  1. #1
    Join Date
    Apr 2008
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    Default Bakup MTA with Zimbra Open Source

    Hello all,

    I believe that I have my installation troubles figured out, but I want to check before I break something.

    The Setup:

    I have Zimbra installed, via the 'simple' installation instructions, on a machine at

    In addition, and the MX record at point to is the domain for which the mail service is set up.

    The Plan:

    What I'd like is a backup mail server.

    I plan to install just the MTA on

    Then, update the DNS records for to point to 1st and second.

    The Reason:

    I'd like to continue to receive mail, even if the main server at goes down. I understand that mailboxes would not be available unless and until went back up, but, if I understand correctly: if mail cannot be delivered to, then it will be delivered to, which will hold onto it until is restored.

    The Question:

    Will this work (the way I want it to?). Is there a better way? Can the secondary mail server ( run apache if it is only running the MTA service?

    Thanks for bothering with me.

    ~ Christopher

  2. #2
    Join Date
    Dec 2006
    Minneapolis MN
    Rep Power


    I would install the MTA and LDAP directories on the 2nd server - that way if server #1 goes down, server #2 can still do directory lookups and accept/reject mail appropriately as it comes in.

    I'm not sure about running Apache on port 80 on the 2nd server if you do not install the mailbox server. I don't see why that wouldn't work.

    - mta
    - ldap
    - mailbox
    - (everything)
    - mta
    - ldap

    have 2 MX records, the first chocie being server1, the 2nd choice being server2, and everything should be happy.

  3. #3
    Join Date
    Apr 2008
    Rep Power

    Default How would I configure the second LDAP

    So on LDAP on server number 2, the setup would be as follows:

    Status: Disabled
    Create Domain: No
    Domain to Create: *blank*
    Root Password: *From root*
    Replication Password: *From root*
    Postfix Password: *From root*
    Amavis Password: *From root*

    Can someone confirm this is the correct setting?

    In addition, where can I find the values on the root. I assume they are in a config file somewhere?

    ~ Christopher

  4. #4
    phoenix is offline Zimbra Consultant & Moderator
    Join Date
    Sep 2005
    Vannes, France
    Rep Power


    The easiest method of getting a backup mail server is to use a DNS hosting company that provides this server, if your mail server goes down they will collect (and try to deliver) the mail for up to five days. One such company is, there are other that provide the same service hif you google you'll find them.


    Acompli: A new adventure for Co-Founder KevinH.

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