Rejected messages from addresses I've never heard of

QUESTION:
I just started my computer this morning and I had 9 undeliverable/ spam/ rejected messages from addresses I never heard of. I have a feeling I am being hijacked to send spam. Please advise.
ANSWER:
It’s someone pretending to be you when they send out their spam messages. It never touches your computer. The recipient’s server sends the rejections to you because that’s where the spam message is pretending to be coming from. There’s really nothing we can do about it, short of giving you a new email address.