How do I receive mail sent to any address on my domain?

1. In admin.cirrux.co, go to Domains and open the domain.
2. Open the menu (the three dots) and choose Configure catch all mailbox.
3. Pick the mailbox that should receive the mail. You don't type an address or a pattern anywhere.

From then on, mail to an address on that domain that has no mailbox or alias of its own goes to that mailbox. Addresses that do exist keep getting their own mail.

Keep track of what arrives

Each address that receives mail through the catch-all is added to the mailbox, marked Auto-added. You can see which addresses people actually use, and stop one that only gets spam with Deactivate address. Mail to a deactivated address is refused. Plus addresses (name+tag@) aren't added separately.

Set a catch-all on each domain where you want one, including extra domains that point to the same mailbox. To turn it off, choose No catch all configured in the same dialog.