> Since I have been getting this message when trying to close the program, I
> am unable to send any mail. I have been receiving mail, but cannot send.
>
> Any suggestions??
It's because you must have a message in the Outbox that cannot be sent.
This could occur because the message contains a large attachment, or because
OE is taking too long to contact the necessary SMTP server.
I would try deleting and recomposing the message(s) in the Outbox, and
reconfiguring all settings within Tools > Accounts > Mail.
HTH,
Ricky