spring boot admin email linux服务器发不出邮件

spring:
  mail:
    host: smtp.163.com
    username: [email protected]
    password: password
    properties:
      mail:
        smtp:
          auth: true
          ssl:
            enable: true
          starttls:
            enable: true
            required: true
  port: 465

需要开启mail的ssl和端口465  ，默认阿里云服务器是25.