As an Eagle client using Domain, I want Domain enquiries to be imported into Eagle via API rather than through the Domain "Other Enquiry Email" field, so that I can continue to automatically import enquiries into Eagle while also sending enquiries to a separate business email address.

Currently, Domain enquiry handling within Eagle is controlled by a single domain_enquiries setting that offers three mutually exclusive options:
- Listing agents + account email
- Listing agents + Eagle import
- Listing agents only

The existing Eagle import functionality appears to rely on Domain forwarding enquiry emails to Eagle's import mailbox. Eagle then processes emails received from enquiries@domain.com.au, parses the content, and creates or updates contacts and enquiry records.

Because the import mechanism is email-based, clients must use Domain's "Other Enquiry Email" field to direct enquiries into Eagle. This prevents them from using that same field for a separate business email address.

As a result, clients currently cannot:
- Automatically import Domain enquiries into Eagle.
- Send enquiries to an additional custom business email address.
at the same time.