diff --git a/mailserver.env b/mailserver.env
index 61f1f855..c372cb9b 100644
--- a/mailserver.env
+++ b/mailserver.env
@@ -10,6 +10,13 @@ OVERRIDE_HOSTNAME=
 # 1 => Enables debug on startup
 DMS_DEBUG=0
 
+# critical => Only show critical messages
+# error => Only show erroneous output
+# **warn** => Show warnings
+# info => Normal informational output
+# debug => Also show debug messages
+SUPERVISOR_LOGLEVEL=
+
 # 0 => mail state in default directories
 # 1 => consolidate all states into a single directory (`/var/mail-state`) to allow persistence using docker volumes
 ONE_DIR=0