Merge pull request #6170 from thundernest/send_message_timeout

import javax.net.ssl.SSLException

import org.apache.commons.io.IOUtils

private const val SOCKET_SEND_MESSAGE_READ_TIMEOUT = 5 * 60 * 1000 // 5 minutes

private const val SMTP_CONTINUE_REQUEST = 334

private const val SMTP_AUTHENTICATION_FAILURE_ERROR_CODE = 535

            val socket = this.socket ?: error("socket == null")

            // RFC 1047

            socket.soTimeout = SOCKET_READ_TIMEOUT

            inputStream = PeekableInputStream(BufferedInputStream(socket.getInputStream(), 1024))

            executeCommand("DATA")

            // Sending large messages might take a long time. We're using an extended timeout while waiting for the

            // final response to the DATA command.

            val socket = this.socket ?: error("socket == null")

            socket.soTimeout = SOCKET_SEND_MESSAGE_READ_TIMEOUT

            val msgOut = EOLConvertingOutputStream(

                LineWrapOutputStream(

                    SmtpDataStuffing(outputStream), 1000