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

private static void sendMail() throws Exception {
    String smtpServer  = "hogehoge.smtp.server.com";
    int port           = "587";
    String userid      = "from@gmail.com";
    String password    = "password";
    String contentType = "text/plain";
    String subject     = "Test Subject";
    String from        = "from@gmail.com";
    String to          = "to@gmail.com";
    String bounceAddr  = "from@gmail.com";
    String body        = "send mail";

    Properties props   = new Properties();

    props.put("mail.transport.protocol", "smtp");
    props.put("mail.smtp.auth", "true");
    props.put("mail.smtp.starttls.enable","true");
    props.put("mail.smtp.host", smtpServer);
    props.put("mail.smtp.from", bounceAddr);

    Session mailSession = Session.getInstance(props);
    mailSession.setDebug(true);

    MimeMessage message = new MimeMessage(mailSession);
    message.addFrom(InternetAddress.parse(from));
    message.setRecipients(Message.RecipientType.TO, to);
    message.setSubject(subject);
    message.setContent(body, contentType);

    Transport transport = mailSession.getTransport();
    try{
        System.out.println("Sending ....");
        transport.connect(smtpServer, port, userid, password);
        transport.sendMessage(message,message.getRecipients(Message.RecipientType.TO));
        System.out.println("Sending done ...");
    }
    catch(Exception e) {
        System.err.println("Error Sending: ");
        e.printStackTrace();
    }
    transport.close();
}

$ printf "%s%s%s" from@gmail.com from@gmail.com password | openssl base64 -e | tr -d 'n'; echo
ZnJvbUBnbWFpbC5jb20AZnJvbUBnbWFpbC5jb20AcGFzc3dvcmQ=

$ telnet hogehoge.smtp.server.com 587
Trying xxx.xxx.xxx.xxx...
Connected to hogehoge.smtp.server.com
Escape character is '^]'.
220 smtp.server.com ESMTP
EHLO localhost // my type

250-smtp.server.com
...
250 AUTH LOGIN PLAIN CRAM-MD5
AUTH PLAIN ZnJvbUBnbWFpbC5jb20AZnJvbUBnbWFpbC5jb20AcGFzc3dvcmQ= // my type
235 ok, go ahead (#2.0.0)

MAIL FROM:<from@gmail.com> // my type
250 ok

RCPT TO:<to@gmail.com> // my type
250 ok

DATA // my type
354 go ahead

subject:Test Mail                 // my type
from:User Mail <spoof@gmail.com>  // my type. set envelope from mail address.
to:to@gmail.com                   // my type
                                  // my type
send mail.                        // my type
.                                 // my type
250 ok 1481706367 qp 12070

quit // my type
221 smtp.server.com
Connection closed by foreign host.