This is a delivery status notification, automatically generated by MTA mail.isc.chubu.ac.jp on Sat, 18 Oct 2008 06:38:51 +0900 Regarding recipient(s) : 3dnakayama(a)isc.chubu.ac.jp Delivery status : Failed. Message could not be delivered to domain <isc.chubu.ac.jp> .Failed while initiating the protocol. <[(&#39;3dnakayama(a)isc.chubu.ac.jp&#39;, 550, &#39;&lt;3dnakayama(a)isc.chubu.ac.jp&gt;: Recipient address rejected: User unknown in local recipient table')]> MTA Response :550 The original message headers are included as attachment.