interface MailMessage Since 0.1.0 An outgoing email message. Properties readonly to: string | readonly string[] Recipient address(es). readonly optional from: string Sender address; omitted to use the provider default. readonly subject: string Subject line. readonly optional html: string HTML body. readonly optional text: string Plain-text body. readonly optional cc: readonly string[] Carbon-copy recipients. readonly optional bcc: readonly string[] Blind-carbon-copy recipients.