diff --git a/start.sh b/start.sh
index 6670b17..e3e4fe3 100644
--- a/start.sh
+++ b/start.sh
@@ -65,7 +65,7 @@ if [ -n "$RELAY_LOGIN" -a -n "$RELAY_PASSWORD" ]; then
     postmap /etc/postfix/sasl_passwd
   else
    # use static database
-    postconf -e "smtp_sasl_password_maps = inline:{${RELAY_LOGIN}=${RELAY_PASSWORD}}"
+    postconf -e "smtp_sasl_password_maps = inline:{$RELAY_HOST=${RELAY_LOGIN}:${RELAY_PASSWORD}}"
   fi
   postconf -e 'smtp_sasl_security_options = noanonymous'