this should be changed too

setup/flavors/compose/mailu.env

@@ -155,9 +155,8 @@ DOMAIN_REGISTRATION=true
 # Docker-compose project name, this will prepended to containers names.
 COMPOSE_PROJECT_NAME={{ compose_project_name or 'mailu' }}
 
-# Default password scheme used for newly created accounts and changed passwords
-# (value: PBKDF2, BLF-CRYPT, SHA512-CRYPT, SHA256-CRYPT)
-PASSWORD_SCHEME={{ password_scheme or 'PBKDF2' }}
+# Number of rounds used by the password hashing scheme
+CREDENTIAL_ROUNDS=12
 
 # Header to take the real ip from
 REAL_IP_HEADER={{ real_ip_header }}