BuddyPress.org

A ‘catchall’ is configured at your email server it’s not a WP/BP feature for example I use Google domain email accounts a lot as they are easier for clients at times, with these and with my own I can set one account ”info’ / ‘admin’ as an account that receives any email directed to mydomain.com so even if there isn’t an account set up for joeblogs@mydomain.com if an email is sent to that address it will end up in the account I’ve instructed, just means I can’t run out of email addresses.