--- deliver.c.orig	2008-05-02 13:30:37.000000000 +0200
+++ deliver.c	2008-05-02 12:35:36.000000000 +0200
@@ -1005,6 +1005,10 @@
 			/* Saving to INBOX should always work unless
 			   we're over quota. If it didn't, it's probably a
 			   configuration problem. */
+
+			if (stderr_rejection)
+				fprintf(stderr, "%s\n", error_string);
+
 			return EX_TEMPFAIL;
 		}