import java.util.Properties;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import com.sun.mail.smtp.SMTPSSLTransport;
 
public static void sendMail(String to, String from, String subject, Multipart content) {
try {
// create properties
Properties props = System.getProperties();
// < -- authorization, i.e. account &amp; password is required -->
props.put("mail.smtps.auth", "true");
// < -- it is important you use the correct port. smtp uses 25, smtps 465 -->
props.put("mail.smtps.port", "465");
// < -- put the smtps server host address here -->
props.put("mail.smtps.host", "smtp.gmail.com");
 
// create session
Session session = Session.getDefaultInstance(props);
session.setDebug(true);
 
// create content
MimeMultipart msgContent = new MimeMultipart("alternative");
 
// Text Mail
MimeBodyPart html = new MimeBodyPart();
// < -- we will send plain text, "text/html" is possible as well -->
html.setContent(content, "text/plain");
html.setHeader("MIME-Version", "1.0");
html.setHeader("Content-Type", "text/plain; charset=iso-8859-1");
msgContent.addBodyPart(html);
MimeMessage msg = new MimeMessage(session);
msg.setContent(content);
// set sender and recipient
msg.setFrom(new InternetAddress(from));
msg.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
msg.setSubject(subject);
 
// transport the message
// < -- we will send the message over smtps -->
SMTPSSLTransport transport = (SMTPSSLTransport)session.getTransport("smtps");
 
// connect to server
// < -- fill in gmail email address and password -->
transport.connect("smtp.gmail.com", "mail@gmail.com", "password");
 
// send the message
transport.sendMessage(msg, msg.getAllRecipients());
// close the connection
transport.close();
} catch> (Exception e) {
e.getStackTrace();
return;
}
}