11.10. How can I test if I'm using Enigmail correctly?

First, you can try to send yourself some message signed/encrypted, and check if you are able to verify/decrypt them correctly. Then you can send messages to Adele, “the Friendly OpenPGP email robot”, at adele-en@gnupp.de. Adele is an automated program that is able to receive and understand OpenPGP messages and reply accordingly. Remember to send her your public key so she can encrypt test messages to you. Some examples of communications with Adele are shown in Section 8.