Originally Posted by mixture
It's a fact of life on the internet that no matter how careful, you will eventually receive at least one spam message to your email address. Get over it. Sorry, but it's the honest truth.
Rather than wasting time "finding another address" ...seeing as it is a business address, invest in better anti-spam measures.
- (unusually) you have missed the point of the OP, the Q being how an undeclared private email address became associated with an 'anonymous' hotmail address.
Rans6 - are there any clues in either your hotmail name, AFORS name/advert or back-up address for hotmail that could do it?