Email types

Transactional

Triggered by something a user did, and expected by them: sign-up confirmations, password resets, receipts, alerts. Send these with the Send Email endpoint.

• Don't need an unsubscribe link (but can have one)
• Should be fast and predictable, so keep them simple

Marketing

Sent to many people at once: newsletters, announcements, promotions. Send these with Broadcasts.

• Must include an unsubscribe link. Broadcasts add one-click unsubscribe headers automatically, and {{{RESEND_UNSUBSCRIBE_URL}}} gives you a link for the body.
• Only send to people who opted in