catch-all setup issue

Hi,

I've just set up Mailbox to use a custom domain as explained here: https://kb.mailbox.org/en/private/custom-domains/using-emails-with-a-custom-domain/

What I would like is to be able to receive email from ANY addresses from my domain. I've just tested by adding an email alias for my custom domain and it works with ONLY that particular address but I can't find a way to just catch ANY address. As a matter of fact if I remove that alias and send an email to that address, the mail does not get delivered and get: "Undelivered Mail Returned to Sender".

Furthermore reading: https://kb.mailbox.org/en/private/custom-domains/using-e-mails-with-a-custom-domain-faq/#can-i-use-catch-all-addresses-with-my-own-domain-at-mailbox it says:

"Yes, this is possible. Details can be found in the separate article on own domain and catch-all addresses"

But when I click the provided link I see in german:

"Antworten für Privatkunden

Die Knowledge-Base für Privatkunden ist bereits weitgehend auf dem neuesten Stand. Vereinzelt werden einzelne Artikel aktuell noch überarbeitet und zeitnah angepasst. Wir danken Ihnen für Ihr Verständnis und freuen uns, Ihnen stets aktuelle Informationen zur Nutzung von mailbox bereitzustellen.

Bitte beachten Sie: Die Knowledge Base hat sich ein wenig verändert. Kategorien wurden angepasst und ggf. hinterlegte URLs aus der alten Knowledge Base sind nicht mehr gültig."

The question is: Do I need to configure each email alias for every address that I want to catch? I definitely do not want to create an alias each time I want to use a new address (my use case is to use different addresses for each service I register to have better privacy from third parties. E.g: amazon@mycustomdomain.com, netflix@mycustomdomain.com, etc. I just somehow want mailbox to catch any: @mycustomdomain.com addresses that I might decide to use on the fly. Is it possible to do this? If so, how do I do it?

Thanks in advance,

Lucas.