I'm trying to do java mail and im getting an error "Cant send command to SMTP host". Any help would be appreciated. And any future problems' solutions if possible.

The exact Exception is

javax.mail.MessagingException: Can't send command to SMTP host;

nested exception is:

java.net.SocketException: Connection closed by remote host

at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:2106)

at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:2093)

at com.sun.mail.smtp.SMTPTransport.close(SMTPTransport.java:1184)

at javax.mail.Transport.send0(Transport.java:197)

at javax.mail.Transport.send(Transport.java:124)

at TestEmail.main(TestEmail.java:45)

at __SHELL17.run(__SHELL17.java:6)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at bluej.runtime.ExecServer$3.run(ExecServer.java:774)

Caused by: java.net.SocketException: Connection closed by remote host

at com.sun.net.ssl.internal.ssl.SSLSocketImpl.checkWrite(SSLSocketImpl.java:1186)

at com.sun.net.ssl.internal.ssl.AppOutputStream.write(AppOutputStream.java:43)

at com.sun.mail.util.TraceOutputStream.write(TraceOutputStream.java:114)

at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)

at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)

at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:2104)

... 11 more

My code is as follows

import java.util.*;

import javax.mail.*;

import javax.mail.internet.*;

import javax.activation.*;

// Send a simple, single part, text/plain e-mail

public class TestEmail {

public static void main(String[] args) {

// SUBSTITUTE YOUR EMAIL ADDRESSES HERE!!!

String to = "my gmail account whose name i removed for publicity";

String from = "my hotmail account whose name i removed for publicity";

// SUBSTITUTE YOUR ISP'S MAIL SERVER HERE!!!

String host = "smtp.live.com";

// Create properties, get Session

Properties props = new Properties();

// If using static Transport.send(),

// need to specify which host to send it to

props.put("mail.smtp.host", host);

props.put("mail.smtp.starttls.enable", "true");

// To see what is going on behind the scene

props.put("mail.debug", "true");

Session session = Session.getInstance(props);

try {

// Instantiatee a message

Message msg = new MimeMessage(session);

//Set message attributes

msg.setFrom(new InternetAddress(from));

InternetAddress[] address = {new InternetAddress(to)};

msg.setRecipients(Message.RecipientType.TO, address);

msg.setSubject("Test E-Mail through Java");

msg.setSentDate(new Date());

// Set message content

msg.setText("This is a test of sending a " +

"plain text e-mail through Java.\n" +

"Here is line 2.");

//Send the message

Transport.send(msg);

}

catch (MessagingException mex) {

// Prints all nested (chained) exceptions as well

mex.printStackTrace();

}

}

}

解决方案

The server requires STARTTLS. Here's what I get if I do a manual SMTP session with telnet:

220 BLU0-SMTP122.phx.gbl Microsoft ESMTP MAIL Service, Version: 6.0.3790.4675 ready at Mon, 18 Jul 2011 17:08:14 -0700

HELO jhmg.net

250 BLU0-SMTP122.phx.gbl Hello [70.123.155.64]

MAIL FROM:

530 5.7.0 Must issue a STARTTLS command first

This server does not accept unencrypted connections