Step 1:

Log in to your KAS (Technical Administration) and click the menu item Email.

Step 2:

Choose the subitem Email Forwarding.

Step 3:

Click on Create a new email forwarding.

Step 4:

Enter your data in the respective fields.

Email address: The desired alias of your email address from which emails should be forwarded. In this tutorial it's contact.

target 1: Here you need to enter the target email address to which the emails should be forwarded. If you want multiple target addresses, please click on "another forwarding target" and enter the target address. By clicking on save, the forwarding address is going to be created.

Please note that some email services provide spam filters for their customers. So a forwarded email can be recognized as spam by one of those filters which means that the email won't be delivered to the target address.

Step 5:

The email forwarding is now going to be created and will be active within 5 to 15 minutes. You can recognize that by the state "in progress".

Step 6:

Spam filters cannot be manually configured for email forwarding. They are automatically activated in the following cases:
 
In both cases, a red icon will be displayed in the KAS (Technical Administration) for email forwarding, indicating the spam filter status. This icon will not appear if the email is forwarded to an internal email account with no spam filters enabled.