If you feel your email address might be blacklisted or sending out spam to other emails, there are a free tests you can run.Test to see if your IP address or Domain is blacklisted. 1. Visit the following site. http://mxtoolbox.com/blacklists.aspx2. Enter in your IP address or Domain name and click "Blacklist Check".Test to see if your email address is setup correctly.1. Visit the followig site: http://www.mail-tester.com/ and follow the instructions.