使用JavaMail連接帶有TLS的SMTP

http://blog.sina.com.cn/s/blog_5595d514010005qj.html

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;


public class SendMailBySMTP {
String d_email = "[email protected]"; 
    String d_password = "email2read";
    String d_host = "smtp.sendgrid.net"; 
    String d_port = "587";
    String m_to = "[email protected]";
    String m_subject = "Testing";
    String m_text = "Hey, this is the testing email from spie test email.";


public SendMailBySMTP() {
Properties props = new Properties();
props.put("mail.smtp.user", d_email);
props.put("mail.smtp.host", d_host);
props.put("mail.smtp.port", d_port);
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.auth", "true");
// props.put("mail.smtp.debug", "true");
// props.put("mail.smtp.socketFactory.port", d_port);
// props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
// props.put("mail.smtp.socketFactory.fallback", "false");


SecurityManager security = System.getSecurityManager();


try {
Authenticator auth = new SMTPAuthenticator();
Session session = Session.getInstance(props, auth);
// session.setDebug(true);


MimeMessage msg = new MimeMessage(session);
msg.setText(m_text);
msg.setSubject(m_subject);
msg.setFrom(new InternetAddress(d_email));
msg.addRecipient(Message.RecipientType.TO, new InternetAddress(m_to));
Transport.send(msg);
} catch (Exception mex) {
mex.printStackTrace();
}
}


public static void main(String[] args) {
SendMailBySMTP blah = new SendMailBySMTP();
}


private class SMTPAuthenticator extends javax.mail.Authenticator {
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(d_email, d_password);
}
}
}