Dashboard -> Domain Email -> Email Manage -> Alias Config
Catch-all means a rule where one mailbox receives mail for another mailbox.
After catch-all is enabled, emails sent to all prefixed sub-mailboxes under the current domain will be received by the catch-all mailbox. You do not need to create them one by one; it is equivalent to having countless sub-mailbox accounts, with mailbox prefixes defined by you.
First, let’s look at two mailbox definitions:
Admin mailbox catch-all means collecting all emails for sub-mailboxes into the admin mailbox. After admin mailbox catch-all is enabled in the GetMX dashboard, even if a sub-mailbox has not been manually created in the GetMX dashboard, emails for that sub-mailbox can still be received in the admin mailbox. If the sub-mailbox has been manually added, one copy of the email will be stored in both the admin mailbox and the sub-mailbox. This means you do not need to manually add sub-mailboxes one by one. You can simply enter any mailbox prefix when using the mailbox, and the emails for that sub-mailbox can be checked in the admin mailbox, enabling countless mailboxes.
Sub-mailboxes created through catch-all cannot log in separately and must be viewed in admin mailbox management. To log in separately, they need to be manually added one by one.
Sub-mailboxes are not created, but they are not virtual either. In Domain Manage—Recipient Sub-Mail, you can view all mailboxes that have been caught by catch-all.
Click the blue Catch all Sub-Email by Admin-Email button

Click the green Create Rules button

{all}{number}{letter}{number}@mail.com to be caught by [email protected]. Then countless mailboxes that match this rule, such as [email protected], [email protected], and [email protected], will all be received by the [email protected] mailbox.

Click the yellow Check Alias button
Enter the receiving mailbox to query the matching rule and the mailbox that will receive it. For example, if you query [email protected], you will see that [email protected] will be received by [email protected].


Click Recipient Sub-Mail
Sub-mailbox accounts with receiving records will all be displayed in Recipient Sub-Mail.

{all}, it matches everything, so you cannot add {number} or {letter}.{letter} or {number} should ideally be used only once in a rule to prevent confusion and make management easier.