Hai. when i look event viewer : SMTPsvc event ID : 5000 warning the message file 'c:\program files\Exchsrvr\Mailroot\vsi 1\queue\NTFS-fab0be7001c22d4b0000004f0.EML'in the queue directory 'C\program files\Exchsrvr\Mailroot\vsi 1\queue' is corrupt and has not been enumerated NNTPsvc event ID : 101 warning the server was unable to add the virtual root '/' for the directory '/internet newsgroups ' due to the following error: the parameter is incorrect the is the error code. So I can send email : The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'test@xxxxxxxxxxx Subject 're', Account: 'hasan', Server: 'mail.server.jkt ', Protocol: SMTP, Server Response: '550 5.7.1 Unable to relay for test@xxxxxxxxxx', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79 please resolution to me, and then i send my email. thansk --------------------------------- Do You Yahoo!? Yahoo! Health - Feel better, live better