Results 1 to 5 of 5

Thread: Backup MX?

  1. #1
    bhwong is offline Elite Member
    Join Date
    Feb 2009
    Location
    Singapore
    Posts
    494
    Rep Power
    6

    Default Backup MX?

    I know we can set a secondary MX record that will take over the primary MX when the primary email server failed. The question is, when the primary email server is up, there will be email getting into the secondardy email server during the period the primary email server was down, so how do the email client download email from the secondary email server without having to amend their POP?

    Not to mention that amending POP will lead to redownloading of all email again. Luckily Zimbra has the option to select download email from now on. A very useful feature.

    How do you guys setup a backup email server when the primary failed? Do you use MX record with lower priority too?

  2. #2
    phoenix is offline Zimbra Consultant & Moderator
    Join Date
    Sep 2005
    Location
    Vannes, France
    Posts
    23,491
    Rep Power
    56

    Default

    A quick search would have found this: postfix mackup mx - Yahoo! Search Results
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  3. #3
    bhwong is offline Elite Member
    Join Date
    Feb 2009
    Location
    Singapore
    Posts
    494
    Rep Power
    6

    Default

    Does this mean that we should use postfix instead of zimbra for this purpose?

  4. #4
    phoenix is offline Zimbra Consultant & Moderator
    Join Date
    Sep 2005
    Location
    Vannes, France
    Posts
    23,491
    Rep Power
    56

    Default

    Quote Originally Posted by bhwong View Post
    Does this mean that we should use postfix instead of zimbra for this purpose?
    No but it does describe how to set-up a Backup MX which is, I believe, what you were asking. BTW, Zimbra uses postfix for it's MTA.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  5. #5
    LMStone's Avatar
    LMStone is offline Moderator
    Join Date
    Sep 2006
    Location
    477 Congress Street | Portland, ME 04101
    Posts
    1,367
    Rep Power
    10

    Default

    Quote Originally Posted by bhwong View Post
    I know we can set a secondary MX record that will take over the primary MX when the primary email server failed. The question is, when the primary email server is up, there will be email getting into the secondardy email server during the period the primary email server was down, so how do the email client download email from the secondary email server without having to amend their POP?

    Not to mention that amending POP will lead to redownloading of all email again. Luckily Zimbra has the option to select download email from now on. A very useful feature.

    How do you guys setup a backup email server when the primary failed? Do you use MX record with lower priority too?
    We configure a separate, off-site plain Postfix server to serve as a backup MX for our production Zimbra hosting farm.

    If spammers try sending to the backup MX while Zimbra is up, we don't care, the backup MX cleans the mail just like Zimbra and sends it on if clean immediately to the Zimbra system.

    When the Zimbra system is down for maintenance say, other servers trying to send to Zimbra see that Zimbra is unavailable and send email to the backup MX.

    The backup MX is configured to try to forward all legitimate email to the Zimbra server farm; if Zimbra is unavailable, the backup MX retries periodically.

    To eliminate backscatter and ensure the backup MX only accepts email for valid recipients on the Zimbra system, we run a cron job on the Zimbra system that extracts all valid emails from the system. The output is sent to the backup MX, which runs a separate script that looks for any changes (domains/email addresses added/deleted) and updates the backup MX server's Postfix configuration accordingly and then reloads Postfix.

    DRDB it seems from the posts here can also work; but the method above and DRDB are really designed to handle two different Disaster Recovery use cases.

    I'd start with the use cases your management needs to address, and then the appropriate solution(s) should be straightforward to determine.

    Hope that helps,
    Mark

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Replies: 658
    Last Post: 04-04-2014, 09:01 AM
  2. Proofing Modified Backup Script
    By dkbk in forum Administrators
    Replies: 0
    Last Post: 11-26-2009, 12:52 PM
  3. zimbra opesource Backup Script Problem!
    By tashi in forum Administrators
    Replies: 4
    Last Post: 03-30-2009, 11:49 PM
  4. Keeping a backup server synced with live server
    By Q-Mike in forum Administrators
    Replies: 5
    Last Post: 04-11-2008, 01:40 PM
  5. FYI: ZCS NE backup to fuse/sshfs mount, worked.
    By jagipson in forum Administrators
    Replies: 0
    Last Post: 09-28-2007, 06:37 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •