diff --git a/contrib/testing/smtp-forward-metadata-check.py b/contrib/testing/smtp-forward-metadata-check.py
index cf25c76..8231112 100755
--- a/contrib/testing/smtp-forward-metadata-check.py
+++ b/contrib/testing/smtp-forward-metadata-check.py
@@ -371,10 +371,11 @@ def validate_xforward(delivery: Delivery) -> None:
         raise SMTP22Error(
             f"expected one XFORWARD command, received {commands!r}")
     command = commands[0]
-    for attribute in ("ADDR=", "PORT=", "IDENT=", "SOURCE=LOCAL"):
+    for attribute in ("ADDR=", "PORT=", "IDENT=", "SOURCE=REMOTE"):
         if attribute not in command:
             raise SMTP22Error(
-                f"XFORWARD omitted advertised attribute {attribute}")
+                f"XFORWARD omitted advertised attribute {attribute}: "
+                f"{command!r}")
     for attribute in ("PROTO=", "HELO=", "LOGIN=", "DESTADDR=", "DESTPORT="):
         if attribute in command:
             raise SMTP22Error(