Returned mail: see transcript for details The original message was received at Wed, 25 Apr 2007 18:01:16 GMT from [217.52.32.188]    ----- The following addresses had permanent fatal errors -----     (reason: 550 5.1.1 ... User unknown)    ----- Transcript of session follows ----- ... while talking to mail7.ymail.net.: >>> DATA <<< 550 5.1.1 ... User unknown 550 5.1.1 ... User unknown <<< 503 5.0.0 Need RCPT (recipient)