diff --git a/mailserver.env b/mailserver.env
index 4151c483..d3ea0f14 100644
--- a/mailserver.env
+++ b/mailserver.env
@@ -41,7 +41,6 @@ DMS_VMAIL_UID=
 DMS_VMAIL_GID=
 
 # **empty** => use FILE
-# OAUTH2 => use OAUTH2 authentication (unstable and unfinished)
 # LDAP => use LDAP authentication
 # FILE => use local files (this is used as the default)
 ACCOUNT_PROVISIONER=