回帖：原因知道了：
Get-ReceiveConnector "Client*"|Add-ADPermission -User "authenticated users"-ExtendedRights ms-Exch-SMTP-Accept-Authoritative-Domain-Sender
Get-ReceiveConnector "Client*"|Add-ADPermission -User "authenticated users"-ExtendedRights ms-Exch-SMTP-Accept-Authoritative-Domain-Sender