lately i have received a ton of spam that have the sober virus/worm
i do web site design and have a shared reseller web hosting account let's say my domain is abc.com just for reference. of course i never open up attachment from people i don't know. i have recevived and email with an attachement saying my username and password is attached. some of my client have received this email too. my client said it's from me like firstname.lastname@example.org. They know all emails from me are email@example.com. the email address from line actually has my domain name but a bogus username. so does that mean my computer is infected and now is using my address book to email these people an emai that looks like it's from me?
I even received one of those bogus emails from one of my clients that said they received the bogus email from me. it had firstname.lastname@example.org
what can i do? is my webhosting screwed up?