Check the website of the business. If a business has an online domain, chances are their email address will be on the site's contact page. If you can't find it easily on the site, try the next step.
Go to the page's site map. There is usually a link at the bottom of the home page that says "Site Map." Clicking this link will give you an in-depth look at what information is available on the site. If you still don't see the email address, try Step 3.
Use Google. Type the following ["email" site:www.business.com] without the brackets into Google's search field. Replace www.business.com with the business's website. Click "Search" and see what comes up.
Use an online business directory to search for the business's email address. Try the link at the bottom of this article, or type "email lookup" into your favorite search engine.
Call the business at their general number and ask for the email address of the person or department you are trying to reach.