I get a lot of spam that says it's from my email address. Its just a technique that's used to help get past some mail servers that check the user is allowed to send mail through that server. Send it to the same person it's from... Easily spoofed in the 'bot that's really doin' it.

--=-- My credo: If it's worth doing, it's worth overdoing - just ask my missus, she'll tell ya laugh --=--
You're only paranoid if you're wrong!