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Thread: Zimbra as a smarthost

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  1. #1
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    Default Zimbra as a smarthost

    Hi, I would like my zimbra server to handle the smtp relaying of a particular domain, which is not the current zimbra domain.

    How can I do that ?

    Thank you,
    Fred

  2. #2
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    I seems to get more information about what I want to do but it's not clear yet:

    It seems that :
    - to get the smtp server to accept mail from other domain, I need to setup a authentication : How can I do that ? Must I use a zimbra domain account ?
    - Is it possible to restrict the SMTP recipient to a list of domain instead of the authentication ?

  3. #3
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    Admin Console > Configuration > Servers > Select your server > MTA tab > MTA Trusted Networks and add the IP address(es) for the server(s) you want to allow to relay through your Zimbra server without any authentication.

    See also for background information:
    Postfix Configuration Parameters and search for the "mynetworks" parameter.

    Hope that helps,
    Mark

  4. #4
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    Am I right to think that with this parameter, I need to specified the address of each and every host who could use the relay ? This would be impossible since I have roadwarriors users !

    My best config would be to permit on a recipient domain basis ...?

    I don't want to be an open relay, but I tried for fun to put 0.0.0.0 to allow all network but without success...

  5. #5
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    Quote Originally Posted by drez View Post
    Am I right to think that with this parameter, I need to specified the address of each and every host who could use the relay ? This would be impossible since I have roadwarriors users !

    My best config would be to permit on a recipient domain basis ...?

    I don't want to be an open relay, but I tried for fun to put 0.0.0.0 to allow all network but without success...
    For road warriors, either they should use the ZCS web interface, or you can easily configure their Outlook to do authentication.

    We use the trusted networks parameter to allow, for example, a client's scanners to send scanned documents via email through our Zimbra server without authentication. The scanners are old enough that their firmware has no capability to do smtp-auth.

    And that I suppose is a good, simple way to differentiate:

    • Devices on fixed (hopefully private) IPs that can't do authentication may be added to trusted networks.
    • Users wanting to send through ZCS should be required to authenticate, one way or the other.


    Hope that helps,
    Mark

  6. #6
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    Ok good, that's clear. Thank you for your time.

    If I could still abuse a little bit :

    How do I proceed to enable authentication ? Do I have to create a zimbra mail account and make my users use it ?

    The fact is that my zimbra act as a backup SMTP server, and test server ... The zimbra domain and accounts are not the same as the domain I wanted to SMTP backup.

    So what I understand is I create an account like SMTP@zimbradomain.com, and setup my client to use my zimbra SMTP server with this user.

    Is there a simple way to limit this account to act only as a authentication account : no mail, no anything, exept the name / passwd ?

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