Didn't mean to be condescending... I did mean that you could forward to a non-existant smarthost instead of yanking the network cable. From the article:
In Exchange System Manager, click SmallBusiness SMTP Connector under Connectors. This phase requires an SMTP connector. If the Exchange server does not have an SMTP connector, create one. To do this, follow these steps:
Right-click Connectors, click New, and then click SMTP Connector.
On the General tab, type a temporary name (Temp Connector, for example) in the Name box.
Click Add at the bottom, select the server name and its associated SMTP Virtual Server, and then click OK.
Click Address Space.
Click Add, click SMTP, and then click OK.
In the Internet Address Space Properties dialog box, leave the default settings (E-mail domain * and Cost 1), and then click OK.
Click the General tab, and then go to step 4.
Right-click SmallBusiness SMTP Connector, and then click Properties. If you have more than one SMTP Connector, the one that you want to work with in the following steps is the one that contains the "*" (asterisk) for the SMTP address on the Address Space tab.
Click the General tab. Make a note of all the settings on this tab. You have to return these settings later in this article.
Click Forward all mail through this connector to the following smart hosts.
In the field provided, type a false IP address and enclose it in brackets. For example, type [99.99.99.99].
Click the Deliver Options tab .
Click Specify when messages are sent through this connector.
In the Connection Time list, click Run daily at 11:00 PM.
Click OK to close the SMTP Connector Properties dialog box.
Expand Servers, expand Servername, expand Protocols, expand SMTP. Right-click the Default SMTP Virtual Server, and then click Stop.
It may take several minutes for the SMTP Virtual Server to stop. After the Default SMTP Virtual Server has stopped, right-click the Default SMTP Virtual Server again, and then click Start. It may take several minutes for the Default SMTP Virtual Server to start.
After the Default SMTP Virtual Server has started, wait about 10 minutes.
Now the Default SMTP Virtual Server can re-enumerate the messages and put them in a single queue for the SmallBusiness SMTP Connector or for the one that you named when you created it in step 1.b.
After about 10 minutes, expand Default SMTP Virtual Server, and then click Queues.
Note the total number of messages on the right next to the Small Business SMTP Connector.