* @param MailAddress $from Sender's email
* @param string $subject Email's subject.
* @param string $body Email's text or Array of two strings to be the text and html bodies
- * @param array $options:
+ * @param array $options Keys:
* 'replyTo' MailAddress
* 'contentType' string default 'text/plain; charset=UTF-8'
* 'headers' array Extra headers to set
* @param MailAddress $from Sender's email
* @param string $subject Email's subject.
* @param string $body Email's text or Array of two strings to be the text and html bodies
- * @param array $options:
+ * @param array $options Keys:
* 'replyTo' MailAddress
* 'contentType' string default 'text/plain; charset=UTF-8'
* 'headers' array Extra headers to set