已解决：Authentication failed； nested exception is javax.mail.AuthenticationFailedException: 535 Login_authentication failed; nested exception is javax.m

在Springboot中使用QQ邮箱过程，访问http://localhost/email/send

出现了如下错误：Authentication failed; nested exception is javax.mail.AuthenticationFailedException: 535 Login Fail. Please enter your authorization code to login

这个错误是登陆时出现的，一般是账号或者密码错误。再次去检查QQ邮箱的IMAP/SMTP服务的验证码，复制在下面password。再次去访问，发现消息成功发送到QQ邮箱中了。

spring:
  mail:
    username: 
    password: 
    host: smtp.qq.com
    port: 465
    default-encoding: UTF-8
    properties:
      mail:
        smtp:
          ssl:
           enable: true