Is there a way to check whether an email address exists on an SMTP server (Exchange Server in my case) before calling the SMTPClient.Send method? Here is my code:
Public Sub SendMessage()
Dim smtpMail As SmtpClient
Try
smtpMail = New SmtpClient(Me._SMTPServer)
smtpMail.Send(Me)
Catch ex As Exception
End Try
smtpMail = Nothing
Me.Dispose()
End Sub
...
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