Hi Don, welcome to the Seven Forums.
That error message means there are messages in Outbox
that can not be sent. To get rid of those, first click Work offline
button in ribbon:
Now go to Outbox and delete all unsent messages. Check then your account settings; if the error message in your post was copy pasted there seems to be a typo; the mail server name has one extra space after first dot "mail. "
Shut down WLM, relaunch it and click Go online