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The server response was: 550 5.7.1 Unable to relay for

Posted on 2006-07-14
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Last Modified: 2008-01-09
I keep getting this message from ASP.NET
The server response was: 550 5.7.1 Unable to relay for sender@domain.com.

in XP , I have Visual Studion installed in it, in SMTP Virtual server of XP I added the machine itself for a relay.
in Exchange server 2003 I added the XP machine name in a relay restriction also.

I have this code in asp.net:

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim msg As New MailMessage
        msg.From = "administrator@training.com"
        msg.To = "administrator@training.com"
        msg.Subject = " EMAIL TEST"
        SmtpMail.SmtpServer = "localhost"
        SmtpMail.Send(msg)
    End Sub
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Question by:jskfan
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moorhouselondon earned 750 total points
ID: 17115307
Try changing the msg.From parameter to a legitimate user in the Exchange Active Directory.
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