SendAsDenied; gitlib@example.com not allowed to send as gitlab@git.example.com; STOREDRV.Submission.Exception:SendAsDeniedException.MapiExceptionSendAsDenied; Failed to process message due to a permanent exception with message Cannot submit message

遇到一个gitlab发送邮件的错误，原因是因为gitlab_rails['gitlab_email_from'] = 'gitlab@example.com'该参数没有设置。