How is it that I am SPAMMING myself?

I have been getting emails from my own email address trying to sell me a variety of products in the Subject line.  I have not opened any of them.  This was happening on my old computer and it is now happening with my new computer.  Has any one out there had similar experiences and how does one go about stopping this?  thanks

yes , this happened to a friend of mine and she had to change her e-mail name to stop it she just added the no 1 in it , someone or some thing hi-jacked her name

if you do that come back and go here to do a check

http://www.computerhope.com/forum/index.php/topic,46313.0.html