Originally posted here by dohedo
port 25 is also an SMTP server which means that it does secure e-mail...and can forward e-mail...and is not POP2 or POP3
SMTP stands for Simple Mail Transfer protocol. How does that mean it secures email?? It would only be secure if it's using SSL (Secure Socket Layer) or another encryption scheme.

POP stands for Post Office Protocol, and has nothing to do with port 25 or sending mail.

When you send mail, you use SMTP. (not the only way)
When you receive mail, you use POP. (again, not the only way)

--Sudo