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To create a catch-all email account in Plesk please review the following guide:

Step-by-step: Creating a catch-all email account in Plesk

To create a catch-all email account on a parked domain, please create the email forwarding alias ‘catchall’ in your Domain Control Panel, please see the following Knowledgebase article on how to create an email forwarding alias for a parked domain:

Creating an email forwarding alias for a parked domain

We would recommend that you create specific email forwarding aliases in place of a catch-all, as a catch-all is likely to attract spam.

For more information you might find this hosting guide index useful:

Web Hosting Help Centre