diff --git a/.env.sample b/.env.sample
index e5a8300..ae96d63 100644
--- a/.env.sample
+++ b/.env.sample
@@ -3,21 +3,19 @@ TYPE=mailman3
 DOMAIN=lists.example.com
 LETS_ENCRYPT_ENV=production
 
-MTA=postfix
-CORE_SMTP_HOST=mail.example.com
-CORE_SMTP_PORT=25
-
 SERVE_FROM_DOMAIN=${DOMAIN}
 
+MTA=postfix
+CORE_SMTP_HOST=mail_example_com_smtp # mailu smtp
+CORE_SMTP_PORT=25
+
 MAILMAN_ADMIN_EMAIL=admin@example.com
 MAILMAN_ADMIN_USER=admin
 
-SMTP_HOST=mail.example.com
-SMTP_HOST_USER=lists@lists.example.com
+SMTP_HOST=mail_example_com_smtp # mailu smtp
 SMTP_PORT=25
-SMTP_USE_TLS=True
 
-# keycloak SSO
+# Keycloak SSO
 # KEYCLOAK_SSO_ENABLED=1
 # KEYCLOAK_DOMAIN=login.example.com
 # KEYCLOAK_REALM=sso-queens-united
@@ -26,4 +24,3 @@ SECRET_DB_PASSWORD_VERSION=v1
 SECRET_DJANGO_SECRET_KEY_VERSION=v1
 SECRET_HYPERKITTY_API_KEY_VERSION=v1
 SECRET_MAILMAN_REST_PASSWORD_VERSION=v1
-SECRET_SMTP_HOST_PASSWORD_VERSION=v1