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  1. #1
    Join Date
    Jan 2004

    Multiple MX records? Pros and Cons

    Would appreciate input regarding using multiple MX records for redundancy. There seems to be one school of thought that sees them as unnecessary - unless they are multiple primaries which the user can control. The theory being that if your primary server is down and without a backup MX , people sending you mail will receive a "delayed delivery" warning from their mailserver after 4-6 hours. Mail will be queued and delivered when your server is back online. Using a backup MX, these people will think that their email was delivered but you are still offline.

  2. #2
    Join Date
    Jan 2004
    South East U.K.
    I think backup MX's will still send non-delivery notifications if they haven't been able to deliver email to the primary MX

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