How does the filter of port 25 help with the problem of spam?
Typically, when a customer sends an email, it is routed to a cox.net mail server (e.g. smtp.east.cox.net), and the Cox server relays it to the recipient’s server. Spammers and modern mass mailer viruses commonly bypass the cox.net mail servers. They send mail directly from their computer to others’ mail servers without routing it through a cox.net mail server. The filter of port 25 prevents spammers from bypassing cox.net mailservers and delivering spam directly to Internet users. Also, this filter prevents viruses such as W32.Klez.H@mm from propagating at all.
