A few years ago my email got hacked.  Since then this spam message attaches itself to every email I send.  I am able to manually go in and delete it prior to sending my message out. Any ideas?

Here is the message

Dear friend:
   We are an electronic products wholesale .Our products are of high quality and low price. If you want to do business , we can offer you the most reasonable discount to make you get more profits. We are expecting for your business.
 
                    Please visit our website:  www.haoyunlaid.com
 
Looking forward to your contact and long cooperation with us!
  Our mainly products such the phones, PSP, display TV, notebook, video, computers, Mp4, GPS, xbox 360, digital cameras and so on.
  Welcome to visit our website!
 Mail : (PII removed for security reasons)
 MSN  : (PII removed for security reasons)