Oh My!
Well, there are two possible solutions that I can think
of off the top of my head:
1) You have Outlook Express as your default mailing
device, and perhaps if your computer has other users or
others accessing under the same user Id(as most people do)
in your household then it's possible that if they decided
to e-mail someone from, for instance, a forum Outlook
Express would engage itself in the process, thus sending
the e-mail from your account.
2) It's also possible that you're being "invaded"
by "headaches", or hackers, and they're messing around
with your computer(either learning how to manipulate the
system or just being jerks).
Either way, you could find a way to use a more private e-
mail session(erhm-hotmail).
I hope that was somewhat helpful.
Peace,
Sandshifter.
