More likely, someone is simply "spoofing" your email address.� It's simple to make an email look like it's coming from anyone at all, so it may look like they have managed to hijack your email address, when in reality they have not.   We recommend using www.spamcop.net to see where the email is really coming from.� You can even report them from that website.

Unfortunately, since this really has nothing to do with the machines or their operation, there isn't anything we can do if someone chooses to fake your email address for SPAM.   You can delete that email address, create a new one, and set all default mail to bounce so you don't get their SPAM bounces.