Why doesn POP mail work from “xyz.com”?
Networks on the Internet have long based their security on a concept of “trusted hosts” and “untrusted hosts”. Any machine which is located elsewhere on the Internet is considered to be an “untrusted host”. Although this is a great simplification of the intricacies involved in running a secure site which is connected to the Internet, it will help to relate a general idea explaining why some services are not enabled to other sites which are located outside the FOURnet local Network. FOURnet does not permit access to its POPmail server from other Internet sites, so you’ll need to login directly to the modem pool to access your mailbox. This prevents anonymous users from gaining unauthorized access to the system from remote sites, as well as keeping your mail private as it should be. Because we take the security of our Network seriously, services which are possibly vulnerable to attack (such as POPmail and TALKD) are not allowed anonymous access from outside the FOURnet Network. Recently,
