create
POST /v1/identities/{id}/emails. InboxCreate is one of two shapes:
list
GET /v1/identities/{id}/emails.
delete
DELETE /v1/identities/{id}/emails/{inbox_id}.
send
POST /v1/identities/{id}/emails/{inbox_id}/send. EmailSend is { to: string[], subject, text }. Answers 202 with a receipt — { accepted, from, to, sent_at }; the provider’s message id is deliberately absent.
Sending is gated on the domain’s dns_status; a premature send is a retryable job_not_ready.
messages
GET /v1/identities/{id}/messages — everything that arrived for the persona, both channels unless one is named. The same feed as identities.messages.