Server responses 5.7.3 Authentication Unsuccessful

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  • aravindansubramaniyam
    New Member
    • Mar 2008
    • 1

    Server responses 5.7.3 Authentication Unsuccessful

    Hi,

    I'm using the following code in vb.Net for sending a mail. Its sending the mail from my system. but not sending in the server machine. In the server machine, "Server responses 5.7.3 Authentication Unsuccessful" error comes. Where I've mistaken in the code. But the username and password are same.


    Dim mail As New MailMessage()
    Dim smtp As New SmtpClient("*** .***.com")

    mail.From = New MailAddress("us ername@zxy-abs.com", "username")
    mail.To.Add(txt To.Text)

    mail.Subject = txtSubject.Text
    mail.Body = rtxBody.Text

    smtp.Credential s = New Net.NetworkCred ential("usernam e", "pwd")
    Try
    smtp.Send(mail)
    MsgBox("sent")
    Catch ex As Exception
    MsgBox(ex.Messa ge)
    End Try

    Regards
    Aravind
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