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Thread: Secondary MX

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  1. #1
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    Talking Secondary MX

    Just curious what the proper steps would be to provide my primary machine as a secondary MX for other domains. I found this:

    http://wiki.zimbra.com/index.php?tit...aMtaMyNetworks

    But I'm not sure if this is the only thing I need to do. Previously I had defined the other domains as relay domains in a postfix based system and added them to my_networks but is this all I have to do with Zimbra? or are there more config options that need to be addressed?

    I'll keep digging but I thought I'd check just in case someone has the '5 step manual' of operations needed to make your Zimbra mail server a secondary MX for other domains

    --
    Regards,
    Lonny

  2. #2
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    So ... no one has done this? lol .... Does anyone have any ideas? ... I'd like to get this right the first time rather than hacking around if at all possible.

    Apart from altering the MtaMyNetworks I'm guessing I'd have to add the other domain in my domains somewhere?

    I just want to relay for another domain and would like to use the admin tools provided. I had this working pretty easily in my other postfix config.

    If I find something I'll post it back here.

  3. #3
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    I must be missing something .. I also found the relay MTA but by the sounds of things this is just an external relay for ALL non local mail ... I don't want to use a different SMTP server to relay email, I would just like to relay _for_ another domain. I'm already listed as a secondary MX in DNS ... just need to tell Zimbra somehow now

  4. #4
    phoenix is offline Zimbra Consultant & Moderator
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    Where is the mail coming from for these other domains you mention? Are you just wanting to add other domains to your zimbra server?
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  5. #5
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    Quote Originally Posted by phoenix View Post
    Where is the mail coming from for these other domains you mention? Are you just wanting to add other domains to your zimbra server?

    Basically I have a friend who I was acting as a secondary MX for. If his mail server fails or goes down, I would accept and queue mail on his behalf (store and forward scenario). I just want to have my Zimbra server do this. Before I had definitions in postfix like:

    in relaydomains I had a line:
    hisdomain.com RELAY

    and in main.cf I included his domain in the relay_domains= option.

    I'm also listed in DNS as a secondary MX, 10 being the delivered to server and mine was set to 50.

    Code:
    MX      10 hismailserver.hisdomain.com.
    MX      50 mymailserver.mydomain.com.
    If his machine was ever down, I would queue up messages until his machine came back online, then I could either flush my queue manually or wait long enough and the messages would be sent from me to him.

    For SMTP I had it configured in ASSP to accept mail for other domains (his).

    Is this clear as mud?

    I want to be able to queue mail for another domain in the event that the primary MX host is unavailable.

  6. #6
    phoenix is offline Zimbra Consultant & Moderator
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    You can do it but you'll have to hack the config files and it probably won't survive an upgrade, have a look at the details here and see if they make sense. You might find it easier to use a DNS service that has a backup mail server, I use easydns and if my server is offline they'll collect the mail for up-to five days and just forward it when it comes online. There are problems (and arguments for and against) with having a backup mail server, you can get hit by spam.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

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