Index: src/java/org/apache/james/smtpserver/RcptCmdHandler.java
===================================================================
--- src/java/org/apache/james/smtpserver/RcptCmdHandler.java	(revision 370873)
+++ src/java/org/apache/james/smtpserver/RcptCmdHandler.java	(working copy)
@@ -149,7 +149,7 @@
                     if (!session.getConfigurationData().getMailServer().isLocalServer(toDomain)) {
                         responseString = "530 "+DSNStatus.getStatus(DSNStatus.PERMANENT,DSNStatus.SECURITY_AUTH)+" Authentication Required";
                         session.writeResponse(responseString);
-                        getLogger().error("Rejected message - authentication is required for mail request");
+                        getLogger().error("Rejected message to: " + recipientAddress.toInternetAddress().getAddress() + " - authentication is required for mail request");
                         return;
                     }
                 } else {