Communication Transports (Admin Tools > Settings > Communication Transports) are where you provide the necessary details for Rock to connect with your email service provider. These details are typically provided by your service. Check out the Integrations chapter for assistance with this setup. NoteSMTP Relaying May Bite YouFor development and testing you might decide to use SMTP as your transport. If you do, be sure that the server/service you use is configured to allow the Rock server to relay. If you're using Google Apps, see the tips in the Integrations section below.