Alexandru Florescu put forth on 1/13/2010 7:33 AM: > > permit_mynetworks,
> > Is some option missing? What can I do to prevent this? I found it because I > received spam in this way. > > Using postfix 2.3.3 on Centos 5.4. I'm guessing your telnet client machine is within mynetworks. If so, none of your other checks are valid and any/all mail sent via this telnet is thus accepted regardless of mail from: forgery. -- Stan
