Welcome to Techzonez jfmcd...Like was previously mentioned, your address is probably being spoofed as in the info seen here:

W32.Beagle.B@mm is a mass-mailing worm that opens a backdoor on TCP port 8866. The worm uses its own SMTP engine for email propagation. It can also send the attacker the port on which the backdoor listens and a randomized ID number.

The email has the following characteristics:

From: <spoofed>
Subject: ID <random characters>... thanks
Attachment: <random characters>.exe

Lots of these are out as you know. A good place to find this is WWW.SARC.COM