Routes
Simulate routing for a recipient
Resolves where an inbound email to recipient would be delivered, with a trace of every rule evaluated and why. Read-only; creates nothing.
post/routes/simulate
Headers
Idempotency-Keystring
Optional client-supplied idempotency key. Retrying a request with the same key returns the original result instead of performing the action a second time; if omitted the server derives one from the canonical payload hash. Safe to retry network failures without duplicating side effects.
Request body
Response
Routing decision