There isn't an online database for looking up information through email address but if you can tell me more about the situation, I might be able to help. Can you tell me more about why you need information on this email address and how you were contacted by this email address?
Can you explain what you mean by using your business? Sorry for the multiple questions but it is easier to help when I have all of the information.
Please provide the website URL
What is your website?
What is your name?
The other domain is registered to Alexander Boyes
Does that name sounds familiar to you?