JavaMail中的“Hello World”

import java.util.Properties; 
import javax.mail.*; 
import javax.mail.internet.*; 

public class MailExample 
{ 
public static void main(String args[]) 
throws Exception 
{ 
String host=args[0]; 
String from=args[1]; 
String to=args[2]; 

//Get system properties 
Properties props=System.getProperties(); 

//Setup mail server 
props.put("mail.smtp.host",host); 

//Get Session 
Session session =Session.getInstance(props,null); 

//Define message 
MimeMessage message=new MimeMessage(session); 
message.setFrom(new InternetAddress(from)); 
message.addRecipient(Message.RecipientType.TO, 
new InternetAddress(to)); 
message.setSubject("Hello JavaMail"); 
message.setText("Welcome to JavaMail"); 
//send message 
Transport.send(message); 
} 
}