diff --git a/lxc1/p2-apps/smtp-relay.yml b/lxc1/p2-apps/smtp-relay.yml
index 2c7fab2..5ebffdf 100644
--- a/lxc1/p2-apps/smtp-relay.yml
+++ b/lxc1/p2-apps/smtp-relay.yml
@@ -7,10 +7,10 @@ services:
       - "2525:25"
     environment:
       # 1. THE UPSTREAM SMARTHOST (Where mail goes)
-      - RELAY_HOST=${RELAY_HOST}
-      - RELAY_PORT=${RELAY_PORT}
-      - RELAY_USERNAME=${RELAY_USER}
-      - RELAY_PASSWORD=${RELAY_PASS}
+      - RELAY_HOST=${SMTP_RELAY_HOST}
+      - RELAY_PORT=${SMTP_RELAY_PORT}
+      - RELAY_USER=${SMTP_RELAY_USER}
+      - RELAY_PASS=${SMTP_RELAY_PASS}
 
       # 2. INTERNAL SECURITY (Who can send)
       # Allow your entire subnet (e.g., 192.168.1.0/24) to send without auth