Hello, I was just scanning my server and found that I can send emails if the from address is <>. In other words I can use my mail server as a relay.
I have /etc/tcp.smtp set as
192.168.:allow,RELAYCLIENT=""
127.:allow,RELAYCLIENT=""
:allow
So I know that is supposed to help stop the relaying but how do I stop it from allowing to send with the <> ? Any links or info is greatly appreciated. Thanks.