1.问题描述

• 通过java程序实现邮箱发送验证码的功能
• 使用一段时间后出现发送邮件失败的问题
• 排查后提示：javax.mail.AuthenticationFailedException: 535 Error: authentication failed, syste
• 完整日志

DEBUG: setDebug: JavaMail version 1.4.7
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "smtp.exmail.qq.com", port 465, isSSL true
220 smtp.qq.com Esmtp QQ QMail Server
DEBUG SMTP: connected to host "smtp.exmail.qq.com", port: 465

EHLO DESKTOP-KFLLPQC
250-smtp.qq.com
250-PIPELINING
250-SIZE 73400320
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN
250-MAILCOMPRESS
250 8BITMIME
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "SIZE", arg "73400320"
DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN"
DEBUG SMTP: Found extension "AUTH=LOGIN", arg ""
DEBUG SMTP: Found extension "MAILCOMPRESS", arg ""
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Attempt to authenticate using mechanisms: LOGIN PLAIN DIGEST-MD5 NTLM 
DEBUG SMTP: AUTH LOGIN command trace suppressed
DEBUG SMTP: AUTH LOGIN failed

备注：从日志可以看出是登录授权失败问题。

2.问题解决

• 邮箱的密码需要修改为绑定的微信客户端专用密码
  

 // 配置企业邮箱的基础信息，并发送邮件
    public boolean sendMailQq(String email,String title, String emailMsg) {
        Properties prop = new Properties();
        //协议
        prop.setProperty("mail.transport.protocol", "smtp");
        //服务器
        prop.setProperty("mail.smtp.host", "smtp.exmail.qq.com");
        //端口
        prop.setProperty("mail.smtp.port", "465");
        //使用smtp身份验证
        prop.setProperty("mail.smtp.auth", "true");
        //使用SSL，企业邮箱必需！
        //开启安全协议
        MailSSLSocketFactory sf = null;
        try {
            sf = new MailSSLSocketFactory();
            sf.setTrustAllHosts(true);
        } catch (GeneralSecurityException e1) {
            e1.printStackTrace();
        }
        prop.put("mail.smtp.ssl.enable", "true");
        prop.put("mail.smtp.ssl.socketFactory", sf);

        // 获取Session对象
        // 需要生成邮箱绑定的微信客户端专用密码，邮箱本身的密码会登陆失败
        Session s = Session.getDefaultInstance(prop,new Authenticator() {
            //此访求返回用户和密码的对象
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                PasswordAuthentication pa = new PasswordAuthentication("你的邮箱", "你的邮箱绑定的微信客户端专用密码");
                return pa;
            }
        });

        //设置session的调试模式，发布时取消
        s.setDebug(true);
        MimeMessage mimeMessage = new MimeMessage(s);
        try {
            mimeMessage.setFrom(new InternetAddress("case_team_work@cgr.com.cn","case_team_work@cgr.com.cn"));
            mimeMessage.addRecipient(Message.RecipientType.TO, new InternetAddress(email));
            //设置主题
            mimeMessage.setSubject(title);
            mimeMessage.setSentDate(new Date());
            //设置内容
            mimeMessage.setText(emailMsg);
            mimeMessage.saveChanges();
            //发送
            Transport.send(mimeMessage);
            return true;
        } catch (MessagingException | UnsupportedEncodingException e) {
            throw new ServiceException(ExceptionEnum.EMAIL_VERIFICATION_CODE_SEND_FAILED);
        }
    }