$ telnet *host* 110
Trying *host*...
Connected to *host*.
Escape character is '^]'.
+OK *host* POP3 Server (Version 1.006d) ready at <Wed Dec 24 00:29:42 2003>
user *user*
+OK please send PASS command
pass invalidpass
-ERR invalid usercode or password, please try again
quit
+OK *host* POP3 Server (Version 1.006d) shutdown.
Connection closed by foreign host.