java 发送email

package sendmail;

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

import com.sun.mail.smtp.SMTPTransport;

import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.Date;
import java.util.Properties;

public class sendmail {
	   public static void main(String[] args) throws Exception {
			String from = "mbdkunkka@live.com"; 
		    String mailer = "mbdkunkka";
			String password = "mypassword";
			String to = "recvmailaddr@qq.com";
			String subject = "机器故障，请及时处理";
			String text = "机器与xx时间xx分钟收到重启信息";
			String mailhost = "smtp.live.com";
			String user = "mbdkunkka@live.com";
            

			boolean auth = true;
			boolean debug = true,verbose =true;
			String prot = "smtp";
			
			Properties props = System.getProperties();
		    if (mailhost != null)
			props.put("mail." + prot + ".host", mailhost);
		    if (auth)
			props.put("mail." + prot + ".auth", "true");
		    
		    Session session = Session.getInstance(props, null);
		    if (debug)
			session.setDebug(true);

		    
		    Message msg = new MimeMessage(session);
		    if (from != null)
			msg.setFrom(new InternetAddress(from));
		    else
			msg.setFrom();

		    msg.setRecipients(Message.RecipientType.TO,
						InternetAddress.parse(to, false));
		    
		    msg.setSubject(subject);
			// setText(text, charset)
			msg.setText(text);
		    msg.setHeader("X-Mailer", mailer);
		    msg.setSentDate(new Date());

		    msg.setHeader("X-Mailer", mailer);
		    msg.setSentDate(new Date());
		    
		    
		    SMTPTransport t =
		    		(SMTPTransport)session.getTransport(prot);
		    	    try {
		    		if (auth)
		    		    t.connect(mailhost, user, password);
		    		else
		    		    t.connect();
		    		t.sendMessage(msg, msg.getAllRecipients());
		    	    } finally {
		    		if (verbose)
		    		    System.out.println("Response: " +
		    						t.getLastServerResponse());
		    		t.close();
		    	    }

		    	    System.out.println("\nMail was sent successfully.");

	   }
}


    	    
    	    

　　公共免费邮箱基本都不好用。基本都要加密的smtp地址。smtp的开通和密码要到网页邮箱中设置和获得。