Javamail implements smtp identity authentication

Currently, most smtp servers require identity authentication. If javamail is used to write an email sending and receiving client, how can this function be implemented? The following is a simple column to simulate foxmail's implementation of the authentication function.
Package jmail;
Import javax. mail .*;
Import java. util .*;
Import java. SQL .*;
Import javax. swing .*;
Import java. awt .*;
Public class MailAuthenticator extends Authenticator {
String authenName; // User name
String authenPass; // password
Public MailAuthenticator (String authenName, String authenPass ){
Super ();
This. authenName = authenName;
This. authenPass = authenPass;
}
Public PasswordAuthentication getPasswordAuthentication () {/* if the server requires identity authentication, Sission automatically calls this method.
String temp = null;
If (authenPass. equals ("") | authenPass = null) {/* if the password is blank */
Option op = new Option (null, "authentication", true);/* the pop-up dialog box asking users to enter a password. Option is a custom JDialog that contains a password domain */
Temp = op. showDialog ();/* Option returns the entered password */
AuthenPass = temp;
}
Return new PasswordAuthentication (authenName, authenPass );
}
}
/* The following is the Option class, which is written in jbuilder and does not need to be explained */
Package jmail;
Import java. awt .*;
Import javax. swing .*;
Import com. borland. jbcl. layout .*;
Import java. awt. event .*;
Public class Option extends JDialog {
JPanel panel1 = new JPanel ();
JLabel jLabel1 = new JLabel ();
XYLayout xYLayout1 = new XYLayout ();
JButton jButton1 = new JButton ();
JButton jButton2 = new JButton ();
JPasswordField jPasswordField1 = new JPasswordField ();
JLabel jLabel2 = new JLabel ();
JLabel jLabel3 = new JLabel ();
Icon forget = new ImageIcon (".imagesforget.gif ");
Boolean OK = false;
JLabel jLabel4 = new JLabel ();
JLabel jLabel5 = new JLabel ();
Public Option (Frame frame, String title, boolean modal ){
Super (frame, title, modal );
Try {
JbInit ();
Pack ();
}
Catch (Exception ex ){
Ex. printStackTrace ();
}
}
Public Option (){