Hi,
I'm seeing a strange behavior on my Plesk 10.4.4: other hosts from the public subnet I purchased from my ISP are able to use unauthenticated SMTP as an open relay, while the rest of the world can't (I followed the steps and double-checked, to be sure, the official KB article at http://kb.parallels.com/en/1394).
The whitelist has only ::1 and 127.0.0.0/8 on the allowed entries, and nothing is blacklisted.
Do you have any idea why is it open-relaying from local subnet's hosts, and how to stop that?
Thanks,
Marco
I'm seeing a strange behavior on my Plesk 10.4.4: other hosts from the public subnet I purchased from my ISP are able to use unauthenticated SMTP as an open relay, while the rest of the world can't (I followed the steps and double-checked, to be sure, the official KB article at http://kb.parallels.com/en/1394).
The whitelist has only ::1 and 127.0.0.0/8 on the allowed entries, and nothing is blacklisted.
Do you have any idea why is it open-relaying from local subnet's hosts, and how to stop that?
Thanks,
Marco