-# A queue run will try these in order, since queue_run_in_order is set.
-# Arrange that the first one is accepted, so it should fire up the second
-# on the same connection. But it should respect the retry time.
+# A queue run will try these in order, since queue_run_in_order is set. The
+# first one is accepted, but it shouldn't fire up the second on the same
+# connection, because a 4xx error should no longer put the message on the list.