returned mail : see transcript for details the original message was received at mon , 6 dec 2004 13 : 02 : 57 + 0900 ( kst ) from bzgakxfu @ [ 165 . 194 . 27 . 111 ] - - - - - the following addresses had permanent fatal errors - - - - - bill @ epfl . ch ( reason : 550 bill @ epfl . ch unknown mailbox ) - - - - - transcript of session follows - - - - - . . . while talking to smtp 2 . epfl . ch . : rcpt to : bill @ epfl . ch 550 bill @ epfl . ch unknown mailbox 550 5 . 1 . 1 bill @ epfl . ch . . . user unknown