Sometimes a message gets stuck in Pop. Try deleting the message it hangs at. This shouldn't stop you sending mail.
connect to your mail server (mail.myisp.com) and port 110
and type (send yourself a mail first - or it's a boring example)
user <your email user name> eg user fred
pass <your email password> eg pass password
stat
list (with optional message ID eg list 1)
retr 1
quit
DELE 1 would delete the message with ID 1
RSET undeletes messages (messages marked with DELE are deleted when the quit
command is given Rset unmarks messahges for deletion)
NOOP Does nothing
And that is POP3 basic, and the full command set (there are optional ones).
So toss out OE and get going with telneting to your mail server.