to property

List<String>? to
getter/setter pair

List of destination email addresses. Each email address must be RFC 5322 format. Even single recipients must be in array form. Maximum recipients per email depends on your plan. If you need to send many emails try using contacts or contact groups or use a non standard sendStrategy to ensure that spam filters are not triggered (many recipients in one email can affect your spam rating). Be cautious when sending emails that your recipients exist. High bounce rates (meaning a high percentage of emails cannot be delivered because an address does not exist) can result in account freezing.

Implementation

List<String>? to;