Reject Emails to an Aliase

I’m new here. I hope I’m posting in the right category. I hope this is the same as “Feature requests”.

Can we have a feature in “Aliases” where we can reject emails? I’m using catch-all but don’t want to receive emails for a specific email address. It would be nice to reject it as unknown user.

I get too many spam emails going to that email address.

I see that others will benefits from this feature too. Like for example

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