Add email domain to Customer Organisation

I am finding it difficult to manage the customer organisations in JSD. Customers email through and get added to the customer list but we have to manually add them to an organisation. It would be ideal to have a rule in the organisation that can be turned off or on that includes a domain extension. If a customer emails through with the specified domain extension they are auto added to the organisation.

AC:

• Set a domain extension on the Organization
• System reviews the emails sent through for a new customer and if the domain extension is matched to an organisation it adds the customer to that organisation