If you're like me you sometimes find yourself without an email client. This wouldn't be a problem if I had a web based email account, but I don't so I must Telnet to my POP server. (port 110 normally)

Your client must use CRLF as its \n

These are the commands:

USER uid - login as UID
PASS passwd - the password for UID
STAT - get the status of your account
LIST - list the messages in your account
RETR n - retrieve message n
DELE n - tag message n for deletion
RSET - clear changes to your account
QUIT - Quit

See also: Telnet to SMTP Servers