jmail.SMTPmail Eror '8000ffff'

The messaage was undeliverable.All serves failet to receive the message

forum/functions/functions_send_mail.asp , line 226

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'JMail component
  Case "Jmail"

   'Create the e-mail server object
   Set objJMail = Server.CreateObject("JMail.SMTPMail")

   With objJMail
    'Out going SMTP mail server address
    .ServerAddress = strOutgoingMailServer

    'Who the e-mail is from
    .Sender = strFromEmailAddress
    .SenderName = strFromEmailName

    'Who the e-mail is sent to
    .AddRecipient strRecipientEmailAddress

    'The subject of the e-mail
    .Subject = strSubject

    'Set the e-mail body format (BodyHTML=HTML Body=Text)
    If blnHTML = True Then
     .HTMLBody = strEmailBodyMessage & strEmailBodyAppendMessage
    Else
     .Body = strEmailBodyMessage & strEmailBodyAppendMessage
    End If

    'Importance of the e-mail
    .Priority = 3

    'Send the e-mail
    If NOT strOutgoingMailServer = "mail.x.net" Then .Execute
   End With

   'Close the server mail object
   Set objJMail = Nothing

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W2K No Problems

Windows 2003 Problems

Jmail, smpt : username , pass where are going in functions_send_mail.asp

I'm sorry low language eng.

plaase help me