diff --git a/group_vars/zabbix-server.yml b/group_vars/zabbix-server.yml
index 1b692b0..7d0be6b 100644
--- a/group_vars/zabbix-server.yml
+++ b/group_vars/zabbix-server.yml
@@ -5,3 +5,4 @@ pg_hba_extra:
   user: zabbix
   address: ''
   method: md5
+smtp_mynetworks: localhost