ENiGMA½ uses email to send password reset information to users. For it to work, you need to provide valid [Nodemailer](https://nodemailer.com/about/) compatible `email` block in your [config.hjson](config-hjson.md). Nodemailer supports SMTP in addition to many pre-defined services for ease of use. The `transport` block within `email` must be Nodemailer compatible.
If you don't have an SMTP server to send from, [Sendgrid](https://sendgrid.com/) and [Zoho](https://www.zoho.com/mail/) both provide reliable and free services.
If email is available on your system and you allow email-driven password resets, you may elect to allow unlocking accounts at the time of a password reset. This is controlled by the `users.unlockAtEmailPwReset` configuration option. If an account is locked due to too many failed login attempts, a user may reset their password to remedy the situation themselves.