지메일(GMail)을 사용해서 메일을 보내는 예제이다.

package net.sjava.email.test;
import java.security.Security;
import java.security.Security; 
import java.util.Date; 
import java.util.Properties;   
 
import javax.mail.Authenticator; 
import javax.mail.Message; 
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication; 
import javax.mail.Session; 
import javax.mail.Transport; 
import javax.mail.internet.InternetAddress; 
import javax.mail.internet.MimeMessage;  

public class GMailSenderTest {

    private static final String SSLFACTORY = “javax.net.ssl.SSLSocketFactory”;
    private static final String USERID = “id@gmail.com”; 
    private static final String PASSWORD = “pw”; 
    private static Properties properties = System.getProperties();
    
    static {
        properties.setProperty(“mail.smtp.host”, “smtp.gmail.com”); 
        properties.setProperty(“mail.smtp.socketFactory.class”, SSLFACTORY); 
        properties.setProperty(“mail.smtp.socketFactory.fallback”, “false”); 
        properties.setProperty(“mail.smtp.port”, “465″); 
        properties.setProperty(“mail.smtp.socketFactory.port”, “465″); 
        properties.put(“mail.smtp.auth”, “true”); 
    }
    
    //
    public Message getMessage(Session session, String to, String title, String content) throws MessagingException {
        Message msg = new MimeMessage(session);     
        msg.setFrom(new InternetAddress(to)); 
        msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to, false)); 
        msg.setSubject(title); 
        msg.setText(content); 
        msg.setSentDate(new Date()); 
        
        return msg;
    }
    
    //
    public void send(String to, String title, String content) {
        
        try {
            Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());            
            Session session = Session.getDefaultInstance(properties, new Authenticator() { 
                protected PasswordAuthentication getPasswordAuthentication() { 
                    return new PasswordAuthentication(USERID, PASSWORD); 
                } 
            });            
            Transport.send(this.getMessage(session, to, title, content));
        } catch(Exception e) {
            e.printStackTrace();
        }
    }
    
    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        GMailSenderTest sender = new GMailSenderTest();
        sender.send(“skidboy@daum.net”, “헐”, “내용”);
    }
}