README.md

@@ -59,4 +59,19 @@ Go into your app's Elixir console and enter something like `Bonfire.Me.make_acco
 ### How can I get to the app's Elixir console?
 `abra app run your-server.domain.name app bin/bonfire remote`
 
-For more, see [docs.coopcloud.tech](https://docs.coopcloud.tech).
+### My smtp set-up does not work
+
+One working set-up looks like this (note that the password is set as `MAIL_KEY` instead of `MAIL_PASSWORD`).
+
+```
+COMPOSE_FILE="$COMPOSE_FILE:compose.mail.yml"
+MAIL_BACKEND=smtp
+MAIL_SERVER=smtp.transip.email 
+MAIL_PORT=465
+MAIL_USER=mail@domain.org
+MAIL_KEY=xxxxxxxxxx
+MAIL_SSL=true
+MAIL_FROM=mail@domain.org
+```
+
+For more, see [docs.coopcloud.tech](https://docs.coopcloud.tech).