Renders one White Label email with the branding currently sitting in the console's form and enqueues it to the authenticated admin. Built so a publisher can preview branding changes - saved or not - without triggering a real login or reward.Recipient. Always the acting admin's own address, resolved from the session. The request cannot address anyone else.Model. The body carries the console's preview model, but only the branding keys are honoured: bg_page, bg_card, border_divider, border_row, bg_avatar, text_color, link_color, cta_background, cta_text, publisher_logo_url, plus items[] reduced to its text fields. Colours must be valid CSS hex, the logo a public https URL. Every other key the templates consume - frontendUrl, subject, preheader, the sender and game names, and any item link - is set server-side from the game's own configuration, so this endpoint cannot be used to send arbitrary content or links from LootLocker's sending domain.Rate limit. One send per admin per minute; a second attempt within that window returns 429 with Retry-After.Delivery. The email is queued, not sent synchronously. A 202 means the request was accepted, not that the provider accepted the message.