The key parameters of the e-mail API request are as follows:
- Sender address (for example, info@marketing.customer.com
- Sender name (if needed); so the sender shows as <name> info@marketing.customer.com
- Reply-to address (the address where email replies will be delivered)
- Message body (either as plain text or HTML)
- Recipient email address (1 or more)
- Encoding (UTF-8 or none).