diff --git a/apps/mailserver/15.0.2/docker-compose.yml b/apps/mailserver/15.0.2/docker-compose.yml
index dae34a9f2..06c565185 100644
--- a/apps/mailserver/15.0.2/docker-compose.yml
+++ b/apps/mailserver/15.0.2/docker-compose.yml
@@ -13,10 +13,10 @@ services:
       - 1panel-network
     stop_grace_period: 1m
     dns:
-      - ${DNS1}
-      - ${DNS2}
+      - ${DNS1:-223.5.5.5}
+      - ${DNS2:-119.29.29.29}
     extra_hosts:
-      - ${DOMAIN_HOSTS1}
+      - ${DOMAIN_HOSTS1:-localhost:127.0.0.1}
     hostname: ${HOSTNAME_FQDN}
     ports:
       - ${PANEL_APP_PORT_SMTP}:25