一、添加依赖

 		<dependency>
            <groupId>com.sun.mail</groupId>
            <artifactId>javax.mail</artifactId>
            <version>1.6.2</version>
        </dependency>

二、263邮箱

1，邮箱配置

public static void sendEmail(String host, int port, String userName, String password,
                                 String toAddress, String subject, String message) throws MessagingException {
        Properties properties = new Properties();
        //	是否需要用户认证
        properties.put("mail.smtp.auth", "true");
        //	启用TlS加密
        properties.put("mail.smtp.starttls.enable", "true");
        // properties.put("mail.smtp.ssl.enable", "true");
        properties.put("mail.smtp.host", host);
        properties.put("mail.smtp.port", port);

        Session session = Session.getInstance(properties, new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(userName, password);
            }
        });

        session.setDebug(true);

        MimeMessage mimeMessage = new MimeMessage(session);

        mimeMessage.addRecipient(Message.RecipientType.TO, new InternetAddress(toAddress));
        mimeMessage.setSubject(subject);
        mimeMessage.setText(message);

        Transport.send(mimeMessage);
    }

2，发邮件

 // 263邮箱客户端配置：https://www.263.net/success/mail/client/20160603/970.html 465
            MailUtil.sendEmail("smtp.263.net",25,"liuxm@rootensoft.com","******"
            ,"15250480155@163.com","发送的主题2","发送的内容2");

3，结果

三、qq邮箱

如果发件人是qq邮箱，那么代码要做改变。主要不同的地方有三点：

• 属性里要添加scoketFactory.class
• 密码变成授权码
• MimeMessage钟添加From属性

1，发邮件代码

 public static void sendEmail(String host, int port, String userName, String password,
                                 String toAddress, String subject, String message) throws MessagingException {
        Properties properties = new Properties();
        //	是否需要用户认证
        properties.put("mail.smtp.auth", "true");
        properties.put("mail.smtp.host", host);
        properties.put("mail.smtp.port", port);
        properties.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");

        Session session = Session.getInstance(properties, new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(userName, password);
            }
        });

        session.setDebug(true);

        MimeMessage mimeMessage = new MimeMessage(session);
        mimeMessage.setFrom(new InternetAddress("309997751@qq.com"));
        mimeMessage.addRecipient(Message.RecipientType.TO, new InternetAddress(toAddress));
        mimeMessage.setSubject(subject);
        mimeMessage.setText(message);

        Transport.send(mimeMessage);
    }

2，发送

 MailUtil.sendEmail("smtp.qq.com",465,"309997751@qq.com","授权码"
            ,"15250480155@163.com","发送的主题4","发送的内容4");

3，结果