Problems with unsent mail

[NCSam]

Unsent mail is being sent multiple times and still remains in the Outgoing
mail box. Any new item adds to the confusion. The delete key has no effect
on the mail. Any help would be appreciated.

 

[Brian Tillman]

Unsent mail is being sent multiple times and still remains in the
Outgoing mail box. Any new item adds to the confusion. The delete
key has no effect on the mail. Any help would be appreciated.

http://www.howto-outlook.com/faq/messagestuckinoutbox.htm