国外网站可能需要翻墙看。我复制主要步骤以供参考：
For an administrator to receive the quota messages as well, create a transport rule using the following steps:
1.Navigate to Organization Configuration > Hub Transport. In the result pane, click the Transport Rules tab. In the action pane, click New Transport Rule
Create New Transport Rule
2.On the Introduction page, provide a meaningful name for the rule and enter a descriptive comment (highly recommended) for the rule so other administrators know the function of it. The Enable Rule checkbox is selected by default – do not change it
3.On the Conditions page, complete the following fields. In the Step 1. Select condition(s) box select When the Subject field contains specific words.
4.This selected conditions requires additional value so in the Step 2. Edit the rule description by clicking an underlined value box, click the blue underlined word.
5.Enter your mailbox is as the words, click Add then OK to return to the wizard. Click Next to continue
6.On the Actions page, in the Step 1. Select actions box, select Blind carbon copy (Bcc) the message to addresses as the action to take.
7.Click the blue underlined word and enter the address of the administrator (or the address of a distribution group containing multiple administrators). Once added click OK then. After you configure all the actions, click Next
8.On the Exceptions page, no changes were made so click Next to continue
9.On the Create Rule page, review the Configuration Summary. If you’re satisfied with the configuration of the new rule, click New
10.On the Completion page, review the following, and then click Finish to close the wizard:
A status of Completed indicates that the wizard completed the task successfully.
A status of Failed indicates that the task wasn’t completed. If the task fails, review the summary for an explanation and then click Back to make any configuration changes.
