Error codes
domain_receiving_disabled
HTTP status: 422
What happened
The required domain is missing, is not available to this tenant, is not verified, or does not have receiving enabled. Unknown, deleted and other tenants' domains return the same error.
How to fix
Verify the domain, enable receiving, and create the inbox again.
Supply that tenant domain in the required domain field.
Source: docs/errors/domain_receiving_disabled.md.