Question about SMTP verification of connections sent by javamail

MailBean. java
Package fastfox. util;
Import java. util .*;
Import java. text. SimpleDateFormat;
Import javax. mail .*;
Import javax. mail. internet .*;
Import javax. activation .*;
Import java. io .*;
Public class MailBean {
Public static void sendMessage (String smtpHost, String from, String to, String subject, String messageText) throws MessagingException {
System. out. println ("processing ing mail session for:" + smtpHost );
SmtpAuth sa = new SmtpAuth ();
Sa. getuserinfo ("jcren", "mypassword ");
Java. util. Properties props = new java. util. Properties ();
Props. put ("mail. smtp. auth", "true ");
Props. put ("mail. smtp. host", smtpHost );
System. out. println ("Constructing message-from =" + from + "to =" + );
InternetAddress fromAddress = new InternetAddress (from );
InternetAddress [] toAddresss = new InternetAddress [3];
ToAddresss [0] = new InternetAddress ("jcren@163.com ");
ToAddresss [1] = new InternetAddress ("xxxxx@163.com ");
ToAddresss [2] = new InternetAddress ("ccccc@163.com ");
Int I = 0;
While (I <toAddresss. length ){
Session mailSession = Session. getDefaultInstance (props, sa );
MimeMessage testMessage = new MimeMessage (mailSession );
TestMessage. setFrom (fromAddress );
TestMessage. addRecipient (javax. mail. Message. RecipientType. TO, toAddresss [I]);
TestMessage. setSentDate (new java. util. Date ());
TestMessage. setSubject (subject );
TestMessage. setText (messageText );
System. out. println ("Message constructed ");
Transport. send (testMessage );
System. out. println ("Message sent! ");
I ++;
}
}
Public static void main (String [] args ){
String smtpHost = "smtp.163.com ";
String from = "jcren@163.com ";
String to = "jcren@163.com ";