Q: Where does Enigma Protector store Mailer settings/database?

A: Enigma Protector stores Mailer settings and emails database in a file with the same name as the project file but with .enigmamail extension.

Q: I can't send emails with my gmail account, Mailer reports error...?

A: Gmail does not allow insecure connection (which is used by default), to solve the problem just enable the SSL option in mailer properties.