How do I add someone to my test group?

When testing a message, it is best to send the message to a test group. Add email addresses of yourself and your colleagues of multiple email providers, such as Hotmail and Gmail. You can add a contact to a test group by adding a contact in the contacts overview. Click on the button Add contact. A pop up appears showing the database fields of Spotler. Here you also see the option Test group. Tick the checkbox.