Applies to: Exchange Server 2007 SP3, Exchange Server 2007 SP2, Exchange Server 2007 SP1
Topic Last Modified: 2007-09-05

Use the Remote Network settings page on the New SMTP Receive Connector wizard to specify the servers from which e-mail messages are received. The Remote network settings page appears only if you selected a usage type of Custom, Partner, Internal or Client on the Introduction page.

Note:
By default, a new Receive connector is configured to enable connections from any sending IP address: 0.0.0.0 - 255.255.255.255.

If Microsoft Exchange Server 2007 Service Pack 1 (SP1) is deployed on a computer that is running Windows Server 2008, 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. A default installation of Windows Server 2008 enables support for IPv4 and IPv6.

We strongly recommend against configuring Receive connectors to accept anonymous connections from unknown IPv6 addresses. If you configure a Receive connector to accept anonymous connections from unknown IPv6 addresses, the amount of spam that enters your organization is likely to increase. Currently, there is no broadly accepted industry standard protocol for looking up IPv6 addresses. Most IP Block List providers do not support IPv6 addresses. Therefore, if you allow anonymous connections from unknown IPv6 addresses on a Receive connector, you increase the chance that spammers will bypass IP Block List providers and successfully deliver spam into your organization.

For more information about Exchange 2007 SP1 support for IPv6 addresses, see IPv6 Support in Exchange 2007 SP1 and SP2. For more information about connection filtering, how to add IP addresses to the IP Allow list and IP Block list, and how to configure IP Block List provider services and IP Allow List provider services, see Configuring Connection Filtering.
Add

To add an IP address, and subnet mask, or a range of IP addresses to the remote servers list for the Receive connector, use one of the following methods:

  • To enter an IP address or subnet without a subnet mask, or to specify the subnet mask by using Classless Interdomain Routing (CIDR) notation, click Add or the drop-down arrow located next to Add and select IP Address. In the Add IP address(es) of Remote Servers dialog box, enter the IP address by using one of the following methods:

    • IP address without a subnet mask   For example, 192.168.1.0. If you don't specify a subnet mask by using CIDR notation, the classful default subnet mask is assumed.

    • IP address by using CIDR notation   For example, 192.168.1.0/24.

  • To enter an IP address or subnet together with a subnet mask in dotted decimal notation, click the drop-down arrow located next to Add and select IP and Mask. In the Add Remote Servers - IP and Mask dialog box, enter the IP address and the subnet mask by using the following syntax:

    • IP Address   For example, 192.168.1.0.

    • Subnet Mask   For example, 255.255.255.0.

  • To specify an IP address range by using the first IP address and the last IP address in the range, click the drop-down arrow located next to Add and select IP Range. In the Add Remote Servers - IP Range dialog box, enter the IP address and the subnet mask by using the following syntax:

    • Start Address   For example, 192.168.1.1.

    • End Address   For example, 192.168.255.255.

    Because you can't specify a subnet mask, the classful default subnet mask is assumed.

Edit

To change an existing IP address or range of addresses in the list of remote IP addresses, select the IP address or IP address range, and then click Edit.

Remove

To remove an IP address or range of addresses from the list of remote IP addresses, select the IP address or IP address range, and then click Remove icon.

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