The method is used for sending an Email message to a contact. A new contact is created if no contact with such email address exists.

⚠️ Not recommended for OTP passwords. This method requires the full email HTML in the request body. Because of the content volume, such requests are not logged reliably, which makes delivery troubleshooting difficult.
Use the Send prepared message method instead: the caller only passes substitution variables, the template is stored on our side, so the message is sent faster and all requests are logged correctly.