System.Net.E-Mail.SmtpException: Fehler beim senden von mail. Kann nicht zum Lesen von Daten von der übertragungsverbindung

Dies ist der relevante code (C#)

                    MailMessage m;
                    SmtpClient client;   

                    client.Host = "smtp.mail.yahoo.com";
                    client.Port = 465;  
                    client.EnableSsl = true;
                    client.Credentials = new NetworkCredential("[email protected]", "mypassword");

                    m = new MailMessage();
                    m.From = new MailAddress("[email protected]");
                    m.To.Add(new MailAddress("[email protected]"));
                    m.Subject = "My subject";
                    m.Body = "This is my body. ";

                    client.Send(m);

Dies ist der vollständige Fehler-trace

System.Net.Mail.SmtpException: Failure sending mail. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
   at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
   at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
   --- End of inner exception stack trace ---
   at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
   at System.Net.DelegatedStream.Read(Byte[] buffer, Int32 offset, Int32 count)
   at System.Net.BufferedReadStream.Read(Byte[] buffer, Int32 offset, Int32 count)
   at System.Net.Mail.SmtpReplyReaderFactory.ReadLines(SmtpReplyReader caller, Boolean oneLine)
   at System.Net.Mail.SmtpReplyReaderFactory.ReadLine(SmtpReplyReader caller)
   at System.Net.Mail.SmtpConnection.GetConnection(ServicePoint servicePoint)
   at System.Net.Mail.SmtpTransport.GetConnection(ServicePoint servicePoint)
   at System.Net.Mail.SmtpClient.GetConnection()
   at System.Net.Mail.SmtpClient.Send(MailMessage message)
   --- End of inner exception stack trace ---
   at System.Net.Mail.SmtpClient.Send(MailMessage message)
   at EmailSender.EmailSenderForm.send() in c:\Users\Ankur\Documents\Visual Studio 2012\Projects\EmailSender\EmailSender\EmailSenderForm.cs:line 91

Was mache ich hier falsch?

InformationsquelleAutor Joe Slater | 2013-04-29
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