This is a trick I have enabled through cPanel account, but it worked to enable wildcard email.
Just like wildcard domains, there is a technique exists for routing mails send to non-existing email accounts to a legitimate email account situated in a particular domain. This method can generally be called as Wildcard E-mail
Suppose a client open up a ticket where he is requested to set a wilcard email to email@example.com, where this email account should be an existing one in the domain. And he wants all mails sending to firstname.lastname@example.org(a non existing account and the “*” could be anything) would be delivered to email@example.com.
The above request can be fulfilled by setting the following Account Level Filtering rule.
Put a Filter name as ‘wildcard’ or something identifiable name
Then Rule as, “To begins with”
keyword as ‘wild’ ( where ‘wild’ here means any non existing email accounts starting with that term, ie firstname.lastname@example.org, the client wanted here)
Actions, “Redirect to email” “email@example.com”
You are done!!!
From now onwards mails sending to firstname.lastname@example.org, ie wild1, wild123, wild*** etc would be delivered to email@example.com.