How on earth has this not been implemented?!

We have organisation-specific services and need to offer organisation-specific support.

We use organisation-specific zendesk email addresses, and I need to set a trigger whereby:

Received at: ACME@us.zendesk.com

Set Organisation to ACME

And before someone says, setting potential domains in the organisation set-up doesn't capture all as it's common for user to email on personal rather than business email addresses.

This is such a basic requirement and it blows my mind that it doesn't exist.