Whether you have connected your email account with Fleep or not, you can take a look at what your outgoing emails look like from the Email settings view.
Click on your profile in the bottom left corner of the interface, and choose "Email settings" from the menu that appears. Here, click on "Show example email" - a popup will appear with an example email that shows you how the emails you send out from Fleep look.
To see how Fleep interoperates with email, watch this quick video guide: