[backend] 邮箱ssl

[lin594]

没有开启ssl，导致一些邮箱不能用
必定要更改一些配置
参考链接

至少让这个配置能发邮件

    "email": {
        "password": "BF3zBTA8E7wkFXCg",
        "account": "edialect@edialect.top",
        "body": "<h1>[[${verifyCode}]]</h1>",
        "title": "验证码",
        "host": "smtp.exmail.qq.com",
        "port": "465"
    }

[lin594]

{"timestamp":"2021-09-08 02:45:00","status":404,"message":"发送简单邮件时发生异常！org.springframework.mail.MailSendException: Mail server connection failed; nested exception is javax.mail.MessagingException: Got bad greeting from SMTP host: smtp.qq.com, port: 465, response: [EOF]. Failed messages: javax.mail.MessagingException: Got bad greeting from SMTP host: smtp.qq.com, port: 465, response: [EOF]; message exceptions (1) are:\nFailed message 1: javax.mail.MessagingException: Got bad greeting from SMTP host: smtp.qq.com, port: 465, response: [EOF]","error":"Not Found"}