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Tip: Prevent Internal Servers from Being Filtered

Typically, you don’t want Exchange to apply Sender ID or connection filters to servers on your organization’s network or to internal SMTP servers deployed in a perimeter zone. One way to ensure this is to configure message delivery options for your organization’s transport servers so that they don’t apply filters to IP addresses from internal servers and your perimeter network.
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You can configure which IP addresses to ignore by completing the following steps:
1. Start Exchange Management Console. On an Edge Transport server, select Edge Transport. On a Hub Transport server, expand the Server Configuration node, and then select the Hub Transport node.
2. In the main pane, select the Global Settings node and then double-click Transport Settings. This displays the Transport Settings Properties dialog box with the General tab selected by default.
3. On the Message Delivery tab, you’ll see a list of any existing IP addresses that are being ignored.
4. You can enter IP addresses and IP address ranges in the Internet Protocol Version 4 (IPv4) format, Internet Protocol Version 6 (IPv6) format, or both formats. Click the option button to the right of the Add button and then do one of the following:
  • Select IP Address to enter the IP address of a server or a network that should not be filtered. In the dialog box provided, type a server IP address or network address and then click OK.
  • Select IP Address And Mask to enter the IP address and subnet mask of a server that should not be filtered. In the dialog box provided, type the server’s IP address and subnet mask, and then click OK.
  • Select IP Address Range to enter a range of IP addresses on your organization’s network that should not be filtered. In the dialog box provided, type a start IP address and an end IP address for the range of addresses, and then click OK.

5. Repeat step 4 as necessary. To modify a previous entry, select the entry, and then click Edit. To remove an existing entry, select the entry, and then click the Remove button.
6. Click OK to save your settings.



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