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Thread: Restricting incoming SMTP

  1. #1
    Join Date
    Mar 2008
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    Default Restricting incoming SMTP

    We have an upstream mail filtering service. I'd like to set Zimbra to only accept SMTP from that services list of servers. How do I do so?

  2. #2
    Join Date
    Jan 2008
    Location, Virginia, USA
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    You could always setup your firewall to only accept SMTP connections from the IP addresses (or IP address range). If you run *nix, use iptables. That would be the easiest and at the "lowest level", even before it hits the Zimbra suite.

  3. #3
    Join Date
    Mar 2008
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    Default Very true.

    I know there's a way to do this in postfix, but I didn't know which settings would be overwritten by future upgrades.

    So as you suggested I placed the rules in my perimeter firewall. Problem solved.

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