To create a Content Filtering rule for incoming emails:
- Create a Special Group:
- Go to Administration > Special Groups.
- Click Add.
- Type a name for the special group. Use names such as "Internal" or "my domain".
- Under the Select Accounts drop-down menu, select Enter SMTP Address.
- Type "*@<your_domain>" and click Add >>.
- Click Save.
- Navigate to the Content Filtering screen.
- Click Add > Match any or apply to all to add a new policy.
- On the Step 1: Select Accounts window, do the following:
- Select From specific senders to any recipients for the policy scan.
- Click specific senders/specific recipients.
- Select Anyone on the Select Accounts screen.
- On the Exclude Accounts screen, choose Browse from special groups.
- Select the special group that you created earlier.
- Click Save and then click Next.
- On the Step 2: Specify Policy window, do the following :
- Select Target according to your needs. Note: By default, Subject and Body are ticked.
- Add keywords you wish to apply this policy to, such as “invoice”.
- Click Next.
- Select Target according to your needs.
- On the Step 3: Specify Actions window, do the following:
- Select desired action based on your requirements, such as Quarantine entire message.
- Click Next.
- On the Step 4: Specify Notification window, configure the Notification Settings and click Next.
- On the Step 5: Name and Priority window, do the following:
- Enable the policy.
- Supply a policy name and specify the priority of this policy.
- Click Save.