SpringBoot發送郵件遇到的錯誤：org.springframework.mail.MailAuthenticationException: Authentication failed;

SpringBoot發送郵件時遇到的異常：org.springframework.mail.MailAuthenticationException: Authentication failed; nested exception is javax.mail.AuthenticationFailedException: 550 User has no permission
 

原因：我的郵箱之前對外開放的POP3/SMTP服務 過期了，需要重新開起