# Secret key

The secret key is now stored as a docker secret instead of a variable in the
env file. You need to insert it by running:
`abra app secret insert <your mailu app> secret_key v1 <SECRETKEYHERE>`
and you can remove `SECRET_KEY` from your config file.

# `DOMAIN` is now `MAIL_DOMAIN`

This is important! If your main e-mail domain is something else than the
domain you are reaching the web interface at, you need to make changes.
I.e. in our setup we have `autonomic.zone` pointing an A record at some server
and `mail.autonomic.zone` is a separate server, and MX records are pointing
to the server at `mail.autonomic.zone`.
In this case:
  - `DOMAIN` should be `mail.autonomic.zone` - this is what traefik will use to
  provision a certificate
  - `MAIL_DOMAIN` should be `autonomic.zone`