How to clear an unsent message with a defective address

03. February 2013 · Write a comment · Categories: Outlook for Mac · Tags: , , ,
I am operating Outlook 2011 for Mac OS 10.8.  I am encountering a persistent error message 5.1.2 saying that I there is a message with an recipient address error.  Outlook continues to send my other messages.  If I have no new message to send, it shows "Sending .... 0/1"  How do I clear out the defective unsent message ?