My windows live mail has an unsent message which will not send.  I have deleted it completely but the message saying it cant send because it is too bit and to break it up keeps appearing and is stopping any more mail sending.  My service provider has suggested that there is still a thread of the message still trying to send.  I cannot get help from anybody to get rid of this message, can anybody help here. Cheers

Moved from Windows 7

Original title: Windows live mail