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Thread: Limiting hosts for relay

  1. #1
    Join Date
    Jul 2006
    Location
    Virginia Beach, VA
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    Default Limiting hosts for relay

    I want to limit the number of hosts that can relay email.

    In Exchange I can say only relay from 192.168.0.10, 192.168.0.20, and only for mydomain.com.

    Why? Lets say someone gets a virus or rogue application on their computer I don't want these computers sending email. Currently I can log onto any computer on the local subnet and send an email from myself to anyone without authenticating.

    I've tried using 127.0.0.0/8 192.168.0.10/32 192.168.0.20/32
    under the MTA and no luck.
    EricX

  2. #2
    Join Date
    Oct 2005
    Location
    Thatcher, AZ
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    5,606
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    Default

    If they are using TLS auth for outlook, etc, I think that trumps mynetworks.
    Turn off TLS, and use mynetworks, and it should work.

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