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string
required
UUID of the inbox to send from (get via GET /v1/email/inboxes)
string
required
Recipient email address
string
required
Email subject line
string
required
Email body — plain text or HTML. If the body contains HTML tags, it will be sent as HTML email; otherwise plain text.
id remains the provider message ID used by schedule, cancel, and delivery-status operations. When tracking_available is true, message_id is the Naive sent-message UUID accepted by GET /v1/email/:id and naive email read. Cost: 0.016 credits (charged immediately on success). Cancelling a scheduled send refunds the full 0.016 credits.