POSTFIX - Filter Action for senders not specified in check_sender_access

hi all.

Am using check_sender_access in main.cf to check sender email address.
i placed the senders and the action to take like this :

sender1@domain.com FILTER smtp:10025
sender2@domain.com FILTER smtp:xxxx

I want to take a default action for senders not in this list.

allother_senders FILTER smtp:xxxx

can someone plz advise how can this be achieved ?
thanks