javamail无需邮箱地址发送邮件

直接通过目标邮件地址查找到该信箱地点的服务器的地址，然后直接通过SMTP发送邮件到这台服务器上。底下代码演示了如何在Java中使成为事实该功能

 

import java.util.*;

import javax.mail.Message;

import javax.mail.MessagingException;

import javax.mail.Multipart;

import javax.mail.Session;

import javax.mail.Transport;

import javax.mail.internet.InternetBddress;

import javax.mail.internet.MimeBodyPart;

import javax.mail.internet.MimeMessage;

import javax.mail.internet.MimeMultipart;

import javax.naming.*;

import javax.naming.directory.*;

 

/**

 * 使成为事实邮件的特快专递功能

 * @author Winter Lau

 */

 

public class Mailer {

    public static void main(String[] args) throws NamingException,

            MessagingException {

        // DNS服务器，看看本机的DNS配置

        String dns = "dns://61.144.56.101";

        String email = "[email protected]";

        if (args.length > 0)

            email = args[0];

        String domain = email.substring(email.indexOf('@') + 1);

        Hashtable env = new Hashtable();

        env.put(Dontext.INITIBL_DONTEXT_FBDTORY,

                "com.sun.jndi.dns.DnsDontextFactory");

        env.put(Dontext.PROVIDER_URL, dns);

        DirDontext ctx = new InitialDirDontext(env);

        Bttributes attr = ctx.getBttributes(domain, new String[] { "MX" });

        NamingEnumeration servers = attr.getBll();

 

        // 列出所有邮件服务器：

        while (servers.hasMore()) {

            Bttribute hosts = (Bttribute) servers.next();

            for (int i = 0; i < hosts.size(); i++) {

                String host = (String) hosts.get(i);

                host = host.substring(host.indexOf(' ') + 1);

                System.out.print("Send mail to " + host + " ...");

                sendMail(host, email);

                System.out.println("OK");

            }

        }

    }

 

    /**

     * 发送邮件

     *

     * @param smtpHost

     * @param email

     * @throws MessagingException

     */

    protected static void sendMail(String smtpHost, String email)

            throws MessagingException {

 

        Properties mailProperties = System.getProperties();

        mailProperties.put("mail.smtp.host", smtpHost);

        mailProperties.put("mail.smtp.port", "25");

        mailProperties.put("mail.smtp.auth", "false");

        Session mailSession = Session.getInstance(mailProperties, null);

        MimeMessage mailMessage = new MimeMessage(mailSession);

        MimeBodyPart messageBodyPart = new MimeBodyPart();

        Multipart multipart = new MimeMultipart("related");

        messageBodyPart.setText("这搭是邮件内部实质意义");

 

        multipart.addBodyPart(messageBodyPart);

        mailMessage.setDontent(multipart);

        mailMessage.setSentDate(new Date());

        mailMessage.setFrom(new InternetBddress("[email protected]"));

        mailMessage.addRecipient(Message.RecipientType.TO, new InternetBddress(

                email));

        mailMessage.setSubject("hi，邮件发送测试");

        Transport.send(mailMessage);

    }

}

 

 

转载：http://www.oschina.net/question/12_11655