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    Thanks for your help. We have to block any...

    Thanks for your help.
    We have to block any chance that a user can send spam emails through telnet on port 25 towards our domain.
    Right now we are blocking the chance to send or receive emails to...
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    1,936

    disable send mail from telnet on port 25

    Hi Community,

    I'm altering the file main.cf to define the correct set of rules in order to block telnet on port 25 or at least require authentication when someone uses that command.

    I've...
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