Sender filtering can be used to block e-mail sent from specified addresses and domains and block messages that have empty sender address fields. Specific senders can also be added to the Allowed Senders and Allowed Sender Domains list to allow e-mail from those senders and domains to by-pass spam filtering.

FPE detects and blocks e-mail from sender addresses or domains listed in the Sender Block List and the Sender Domain Block List, and no further resources are used to scan the messages.

Messages with an empty sender address field are also automatically blocked.

Before you begin configuring the sender filtering settings, you need to enable sender filtering.

To enable sender filtering

1. In the Policy Management view of the FPE Administrator Console, in the tree, expand Antispam, and then click Configure.

2. In the Antispam - Configure pane, in the Sender filter section, select the Enable sender filtering check box

Once you have enabled Sender Filtering, you can specify blocked senders and sender exceptions.

To block mail from a certain address

1. In the Policy Management view of the FPE Administrator Console, in the tree, expand Antispam, and then click Configure.

2. In the Antispam - Configure pane, in the Sender filter section, click the Configure Sender Lists button.

3. In the Configure Sender Lists dialog box, perform the following steps:

   1. Select Blocked Senders in the menu bar.
      
      
   2. In the E-mail Address box, enter the e-mail address that you want to add. You must add each address individually.
      
      
   3. Click Apply to save your changes and enter additional e-mail addresses or click Apply and Close to save your entry and return to the Antispam - Configure pane. The e-mail address is added to the Blocked Sender list.
      
      

4. Click Save at the top of the pane to save your configuration.

To block mail from a specified domain

1. In the Policy Management view of the FPE Administrator Console, in the tree, expand Antispam, and then click Configure.

2. In the Antispam - Configure pane, in the Sender filter section, click the Configure Sender Lists button.

3. In the Configure Sender Lists dialog box, perform the following steps:

   1. Select Blocked Domains in the menu bar.
      
      
   2. In the Domain Name box, enter the domain name that you want to add, for example, contoso.com. You must add each domain individually.
      
      
   3. Click Apply to save your changes and enter additional e-mail addresses or click Apply and Close to save your entry and return to the Antispam - Configure pane. The e-mail address is added to the Blocked Sender list.
      
      

   If you want to include sub-domains in the filter, select the Include subdomains check box.

   Note:
   In order to import the domains from an external text file, that file must be in a specific format. Each domain must be on a separate line. The domain name is followed by a tab, which is followed by the word "true" or "false", indicating whether sub-domains should also be blocked (true) or not (false). For more information about importing items into a list, see Importing items into a list.

To block messages with empty sender addresses

1. In the Policy Management view of the FPE Administrator Console, in the tree, expand Antispam, and then click Configure.

2. In the Antispam - Configure pane, in the Sender Filter section, select the Block messages with empty sender address check box and click Save at the top of the pane.

Allowing e-mail from specific senders and sender domains to by-pass spam filtering

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