462 Chapter 7 • Managing the Edge Transport Server Figure 7.62 The New Transport Rule Wizard an attachment equal to or higher than 50 MB to the Quarantine mailbox. Once you have entered the name and comment (optional), click Next. 4. You also have the option of having the rule enabled when it’s created by checking Enable Rule (see Figure 7.62). Managing the Edge Transport Server • Chapter 7 463 5. Next, select the condition(s) for the new rule. For the purpose of this example, you want to apply the rule to messages with an attachment equal to or larger than 50 MB, so you’ll check When the size of any attachment is greater than or equal to limit, set the value to 50000KB, and click Next (see Figure 7.63). Figure 7.63 Transport Rule Conditions 464 Chapter 7 • Managing the Edge Transport Server Figure 7.64 Transport Rule Actions 6. On the Actions page you can select the action(s) that should be taken for the messages matching the confi gured conditions. In this example, you check Put message in quarantine and click Next (see Figure 7.64). Managing the Edge Transport Server • Chapter 7 465 Figure 7.65 Transport Rule Exceptions 7. On the next page you have the option of specifying one or more exceptions. In this example, you won’t specify any exceptions, so just click Next (see Figure 7.65). 466 Chapter 7 • Managing the Edge Transport Server Figure 7.66 The Transport Rule Listed in Exchange Management Console The Address Rewrite Agent The edge transport server also has an agent, called the address rewrite agent, which can be confi gured to enable modifi cation of the SMTP addresses on both inbound as well as outbound e-mail messages. You might want to do this if, for example, your organization consists of multiple domains (perhaps after a merger or acquisition) and should be presented with a consistent appearance of e-mail addresses to external recipients on the Internet. The address rewrite agent can also be used if the organization uses third-party vendors to, for example, provide e-mail support and/or other services. In this situation the organization’s customers would expect messages to come from your 8. On the Confi guration Summary page, click New to create the new rule. 9. Finally, click Finish to exit the New Transport Rule Wizard. The newly created rule will now be listed in the Work pane, as shown in Figure 7.66, and you can at any time disable it or update it as required. If you have multiple rules, you can also change the priority among them. . attachment equal to or higher than 50 MB to the Quarantine mailbox. Once you have entered the name and comment (optional), click Next. 4. You also have the option of having the rule enabled when. check When the size of any attachment is greater than or equal to limit, set the value to 50000KB, and click Next (see Figure 7.63). Figure 7.63 Transport Rule Conditions 464 Chapter 7 • Managing. messages matching the confi gured conditions. In this example, you check Put message in quarantine and click Next (see Figure 7.64). Managing the Edge Transport Server • Chapter 7 465 Figure 7.65