Step 2: Define rules

Name: Choose a name on your own for the Filter. For example: forwarding with local copy

For an incoming message on the following is true: Select any.

the following conditions: Set the conditions together, where will it take place "forwarding with local copy." Select All messages

Click on Add action.

Select Keep

Click again on Add action.

Select: redirecting to / test@domain.tld

Enter instead test@domain.tld the address to which the e-mails are forwarded.

After the new action has been added, select the check-box Process subsequent rules even when this rule matches.

Click on Save to save your Rule.

It will now appear in the menu on the left.