diff --git a/README.MD b/README.MD
index 7548348..659a907 100644
--- a/README.MD
+++ b/README.MD
@@ -72,8 +72,18 @@ Todo
 
 
 ### secrets.env
+Contains mailserver configuration in an oldschool INI file format.  
+```
+[MAIL]
+SERVER = mail.example.com
+PORT = 587
+USER = service_notify@example.com
+PASS = aelaGhuye8Co9cah7aighoo3oongohS4
+```  
+Just configure your servername, port, username and password.
+This is setup for SMTP startls authentication.  
+If you use something else and get it working, let me know.   
 
-Todo
 
 ### etc/systemd/system/make-backup.service  
 Systemd service to make backup.