Gmail 发送邮件

发送邮件代码

public static void sendMailByGmail(String subject, String text, String... toEmail) throws Exception{
        final String host = "smtp.gmail.com";//邮件服务器
        final String from = "xxx@gmail.com";//发件人的邮箱
        final String pass = "*******";//发件人密码
        final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";

        // Get a Properties object
        Properties props = System.getProperties();
        props.setProperty("mail.smtp.host", host);
        props.setProperty("mail.smtp.socketFactory.class", SSL_FACTORY);
        props.setProperty("mail.smtp.socketFactory.fallback", "false");
        props.setProperty("mail.smtp.localhost", "127.0.0.1");
        props.setProperty("mail.smtp.port", "465");
        props.setProperty("mail.smtp.socketFactory.port", "465");
        props.put("mail.smtp.auth", "true");

        Session session = Session.getDefaultInstance(props, null);
        MimeMessage message = new MimeMessage(session);
        message.setFrom(new InternetAddress(from));

        InternetAddress[] toAddress = new InternetAddress[toEmail.length];

        // 批量发送邮件
        for( int i=0; i < toEmail.length; i++ ) { 
            toAddress[i] = new InternetAddress(toEmail[i]);
        }
        System.out.println(Message.RecipientType.TO);
　　　　　
        for( int i=0; i < toAddress.length; i++) { 
            message.addRecipient(Message.RecipientType.TO, toAddress[i]);
        }
        message.setSubject(subject);
        message.setText(text);
        Transport transport = session.getTransport("smtp");
        transport.connect(host, from, pass);
        transport.sendMessage(message, message.getAllRecipients());
        transport.close();
    }

//遇到的问题

 该问题就是在国内无法连接，要使用国外的服务器

使用国外的服务器之后，还会报错

javax.mail.AuthenticationFailedException: 535-5.7.8 Username and Password not accepted

就要进行下图的设置

然后还有服务器的端口开放 出入方向都设置一下