I seem to be having difficulties sending emails.  Some are staying in my outbox without being sent.  For those emails, it won't even allow me to delete them.  Some eventually go, but takes a very long time.  These are simple email responses, not sending large files.  I also experience trouble attaching files, I'll get an error message which then closes down the program and opens it back up, but won't allow me to send.

Why am I having such problems with this.  Started after I upgraded to windows 8...

Any advise/suggestions would be greatly appreciated!! Thanks.