diff --git a/lxc1/p2-apps/smtp-relay.yml b/lxc1/p2-apps/smtp-relay.yml
index 5ebffdf..bdc48ba 100644
--- a/lxc1/p2-apps/smtp-relay.yml
+++ b/lxc1/p2-apps/smtp-relay.yml
@@ -14,7 +14,7 @@ services:
 
       # 2. INTERNAL SECURITY (Who can send)
       # Allow your entire subnet (e.g., 192.168.1.0/24) to send without auth
-      - MYNETWORKS=${RELAY_NETWORKS}
+      - MYNETWORKS=${SMTP_RELAY_NETWORKS}
 
       # 3. IDENTIFICATION
       # The hostname this relay announces itself as