Moodle 3.8.2设置SMTP问题

问题描述：申请腾讯的企业邮箱，一切配置OK，单独写测试单元，通过send测试。但是moodle就是无法发送成功。配置如下：
注意红框部分，按道理对于发送邮件是无关的。但是查看实时日志发现：

Failed to send an email from the user with id ‘2’ to the user with id
‘-99’ due to the following error: “The following From address failed:
[email protected] : MAIL FROM command failed,mail from address
must be same as authorization user ,501,SMTP server error: MAIL FROM
command failed Detail: mail from address must be same as authorization
user SMTP code: 501SMTP server error: MAIL FROM command failed Detail:
mail from address must be same as authorization user SMTP code: 501”.

转发的邮箱居然是“[email protected]”？？？