Blocklist / Suspended User automatic reply

Hello

As a short intro: 

We are offering 2 level support to our customers using Zendesk. We have a contract, hat only allowed 1 level support agents can open tickets with us. Therefore we would like to use the Zendesk Blocklist and Allowlist. 

As for now, if we block a Domain or email, this user can still send an email to our Support email address, but he will not receive any message, that we will not receive the ticket. 

But we would like to send an automatic email notification to everyone that is on our blocklist, if they try to open a ticket with us. Otherwise its a very bad customer experience, if they think they sent us a ticket, but will never receive any answer. 

So it would be great, if we somehow could configure an automatic email or message, that they are not allowed to open tickets and therefore we will not receive this email. 

Is that something you consider adding as a feature?