Need suggestion on reaching local businesses

Hi everyone,
I am working on my interior fung shui design business and my targeted customers are local businesses. From my local chamber of commerce, I was able to get a list of local business emails. However, I don't know how I should send out my emails so that they won't be perceived as spam. I can send my emails on a 1-on-1 basis, but is there something that I can say in the email so that I won't violate the non-spam law?

If you have similar experience, is there any sample emails that you can share with me?

Thank you very much.