I think Peter meant LDAP rather than LOAP. Anyway, LDAP should not
be used unless you are connected to a corporate LAN and your IT
administrator has advised you to use LDAP.
Can you move or delete the messages that are 'stuck' in the Outbox?
After clearing out the Outbox, what happens when you try to send, any error message?
Copy and paste any error message into a reply here.