diff --git a/mailserver.env b/mailserver.env
index 5ae0027b..0c22277d 100644
--- a/mailserver.env
+++ b/mailserver.env
@@ -531,12 +531,9 @@ POSTGREY_AUTO_WHITELIST_CLIENTS=5
 
 ENABLE_SASLAUTHD=0
 
-# empty => pam
+# empty => ldap
 # `ldap` => authenticate against ldap server
-# `shadow` => authenticate against local user db
-# `mysql` => authenticate against mysql db
 # `rimap` => authenticate against imap server
-# Note: can be a list of mechanisms like pam ldap shadow
 SASLAUTHD_MECHANISMS=
 
 # empty => None