I have a Linux Centos / Apache Webserver. It has just Domains, no mailboxes. But it runs Postfix because of the Domains' forms.
Frequently, when I issue a "lsof -i" command, it outputs things like in the attached text file. My questions:
1) What does this output really mean? Is this Server being used for relay? It has not open relay.
2) If so, is there anything I could imediately do to stop it?