How to fix error while sending email from windows from?

Question

System.Net.Mail.SmtpException: Failure sending mail. ---> System.IO.IOException: Unable to read data from the transport connection: net_io_connectionclosed.

at System.Net.Mail.SmtpReplyReaderFactory.ProcessRead(Byte[] buffer, Int32 offset, Int32 read, Boolean readLine)

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)

Answer 1

Hi , I have a same problem.

Here is my code with asp.net interface & vb.net behind.

---

        Dim mailer As New System.Net.Mail.SmtpClient()

        Dim mailMsg As New System.Net.Mail.MailMessage()

        With mailMsg

            .From = New System.Net.Mail.MailAddress(<my maildress>)

            .Subject = "Test"

            .Body = "Test"

        End With

        With mailer

            .Host = "smtp-mail.outlook.com"

            .EnableSsl = True

            .Port = 587

            .Credentials = New System.Net.NetworkCredential(<my maildress>, <my password>)

        End With

        Try

            mailMsg.To.Add(New System.Net.Mail.MailAddress(<my mailadress>))

            mailer.Send(mailMsg)

        Catch ex As Exception

            Throw ex

        End Try

---

Thank you!