Transactional Emails
One-to-one messages triggered directly from your code
A transactional email is one your application sends straight through the API — the one-to-one messages a user expects immediately, like password resets, order confirmations, and account notifications.
Sending with attachments
Attachments are supported on transactional sends. The default limits allow up to 10 attachments on a single email, with their combined size capped at 10MB. Encode each file as base64 and pass it in the attachments array of your request to the /v1/email/send endpoint.
The message as a whole may not exceed 40 MB.
Sending from a template
Transactional emails can also reference a template built in the dashboard. That way one design serves many sends, and each email is still personalized with the recipient's contact data.