Skolink:Meez: I just spoke to computer technicians. If it was a virus it would have shown up in the sent folder of my windows mail.
Because of where it was, they think my ISP has been hacked.
I'd have thought a virus would just grab your mail server settings and contacts from windows mail and sent the emails directly itself, therefore they would not appear in the outbox.
If the emails appeared in the sent items on your webmail the technician is correct.
Either your account was breached (so you need to change your password)
Or you ISP was breached (much bigger problem).
Either way at the moment the only thing you can do is change your login password - you should be able to so this in the settings of your webmail.