This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: dxpxgbhmms@sohu.com host sohumx1.sohu.com [36.110.185.79] SMTP error from remote mail server after RCPT TO:: 550 5.1.1 : Recipient address rejected: User unknown in local recipient table dx56.cn@263.net host mxw.263.net [38.83.106.85] SMTP error from remote mail server after RCPT TO:: 550 dx56.cn@263.net:user not exist dwv@mweb.co.za host securemail-mx3.synaq.com [196.35.198.130] SMTP error from remote mail server after RCPT TO:: 550 rejected because recipient verify failed -- user not found dwtjac006@mail.uct.ac.za all hosts for 'mail.uct.ac.za' have been failing for a long time (and retry time not reached) DWSMIC004@mail.uct.ac.za all hosts for 'mail.uct.ac.za' have been failing for a long time (and retry time not reached)