javamail 利用qq邮箱做邮箱服务器，简单小demo

首先maven：

        <dependency>
            <groupId>javax.mail</groupId>
            <artifactId>mail</artifactId>
            <version>1.4.1</version>
        </dependency>

用户名密码验证：

public class MailAuthenticator extends Authenticator{
    
    //邮箱账号
    private String username;
    
    //邮箱密码
    private String password;
    
    public MailAuthenticator(String username,String password){
        this.username=username;
        this.password=password;
    }
    
    @Override
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(username, password);
    }
    
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
}

public class SimpleMailSender {
    private final transient Properties props = System.getProperties();
    private transient MailAuthenticator authenticator;
    private transient Session session;
    
    public SimpleMailSender(final String smtpHostName, final String username,
            final String password){
        try {
            init(username, password, smtpHostName);
        } catch (NoSuchProviderException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    public SimpleMailSender(final String username, final String password) throws NoSuchProviderException {
        //通过邮箱地址解析出smtp服务器，对大多数邮箱都管用
        final String smtpHostName = "smtp." + username.split("@")[1];
        init(username, password, smtpHostName);
     
        }
    private void init(String username, String password, String smtpHostName) throws NoSuchProviderException {
        // 初始化props
        props.put("mail.transport.protocol", "smtp");
        props.put("mail.smtp.auth", "true");
        //qq是smtp.qq.com
        props.put("mail.smtp.host", smtpHostName);
        //ssl邮箱端口
        props.put("mail.smtp.socketFactory.port", 465);//465
        //开启ssl
        props.put("mail.smtp.starttls.enable","true");
        // 验证
        authenticator = new MailAuthenticator(username, password);
        // 创建session
        session = Session.getInstance(props, authenticator);
        session.setDebug(true);
//        Transport transport = session.getTransport();
//        try {
//            transport.connect("smtp.qq.com", 25, "530486639@qq.com", "llg9004_d");
//        } catch (MessagingException e) {
//            // TODO Auto-generated catch block
//            e.printStackTrace();
//        }
    }
    public void send(String recipient, String subject, Object content)
            throws AddressException, MessagingException {
        // 创建mime类型邮件
        final MimeMessage message = new MimeMessage(session);
        // 设置发信人
        message.setFrom(new InternetAddress(authenticator.getUsername()));
        // 设置收件人
        message.setRecipient(RecipientType.TO, new InternetAddress(recipient));
        // 设置主题
        message.setSubject(subject);
        // 设置邮件内容
        System.out.println();
        message.setContent(content.toString(), "text/html;charset=utf-8");
        // 发送
        Transport.send(message);
        }
//    public void send(String recipient, SimpleMail mail)
//            throws AddressException, MessagingException {
//        send(recipient, mail.getSubject(), mail.getContent());
//        }
    
    /**
     * 1.重点现在客户端掉http端口25，腾讯好像不让掉了，必须https调用
     * 2.腾讯使用这种方式连接的话，需要重新申请独立密码，不是qq邮箱的密码，还需开启pop/smtp功能
     * 3.用腾讯的邮局发邮件好像有限制，发送过多，好像直接给你连接断开了
     * 4.如果需要做发邮件的功能的话，最好自己搭建邮局
     * @param args
     * @throws AddressException
     * @throws MessagingException
     */
    public static void main(String[] args) throws AddressException, MessagingException {
        SimpleMailSender sms= new SimpleMailSender("10000@qq.com",
                "dfvasdasdasd");
        //发送过多的话会断开连接
//        for(int i=0;i<100;i++){
            sms.send("11111@qq.com", "hello", "hello");
//            System.out.println("#######:"+i);
//        }
    }
}