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Configure Outbound Access for Detection of Open Proxy Servers for Sender Reputation

Exchange 2010

Applies to: Exchange Server 2010 SP3, Exchange Server 2010 SP2

Topic Last Modified: 2011-03-19

You can use the Shell to configure outbound access for the detection of open proxy servers for sender reputation.

Looking for other management tasks related to managing anti-spam and antivirus features? Check out Managing Anti-Spam and Antivirus Features.

  • Configuring firewall ports   If you've enabled the detection of open proxy servers on sender reputation, you may have to perform additional configuration to enable sender reputation to traverse any firewalls that are between the Edge Transport server and the Internet. The open proxy detection test uses many protocols to test for open proxy servers. The following table lists the ports that must be opened outbound for sender reputation.


    Protocols Ports


    1081, 1080

    Wingate, Telnet, Cisco



    6588, 3128, 80

  • Configuring sender reputation to use a specific proxy server   If your organization uses a proxy server to manage outbound traffic through a firewall, you must configure sender reputation to use the proxy server. Sender reputation must have outbound connectivity to the Internet to detect open proxy servers. You must specify the proxy server name, type, and port number that sender reputation will use to access the Internet.

  • Review Understanding Anti-Spam and Antivirus Functionality   You need to understand the general strategy for configuring all anti-spam agents so that they work together efficiently for your organization.

  • Read Configure Sender Reputation Properties   You need to understand how to configure sender reputation properties.

You need to be assigned permissions before you can perform this procedure. To see what permissions you need, see the "Anti-spam features" entry in the Transport Permissions topic.

You can't use the EMC to configure outbound access for detection of open proxy servers for sender reputation.

To successfully configure sender reputation to detect open proxy servers, you must provide the following information:

  • The name of your organization's proxy server.

  • The port number for your organization's proxy server.

  • The type of proxy server that your organization runs.

To configure outbound access for the detection of open proxy servers, use the following syntax.

Set-SenderReputationConfig -ProxyServerName <String> -ProxyServerPort <Int32> -ProxyServerType <String>

This example configures sender reputation to use the open proxy server SERVER01 that uses an HTTP CONNECT protocol type with 80 as its server port.

Set-SenderReputationConfig - ProxyServerName SERVER01 -ProxyServerPort 80 -ProxyServerType HttpConnect

For detailed syntax and parameter information, see Set-SenderReputationConfig.

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