$ telnet mail.somesite.com 110
Connecting to mail.somesite.com....

+OK POP3 v2001.78rh server ready <5efa.3eb25bc1@mail.someite.org>
USER <username_goes_here> [Enter]
+OK User name accepted, password please
PASS <password_goes_here> [Enter]
-ERR Bad login
PASS <correct_password!> [Enter]
+OK Mailbox open, 250 messages
QUIT [Enter]

+OK Sayonara


Connection to host lost.
$