$this->mail->setTo($to);Set the recipient’s email address.
$this->mail->setFrom($from);Set the sender email address.
$this->mail->setSender($sender);Set the name of the sender.
$this->mail->setSubject($subject);Set the subject line for the email.
$this->mail->setText($text);Set the text format version of the email content.
$this->mail->setHtml($html);Set the HTML version of the email content.
$this->mail->addAttachment($filename);Add an attachment to the email.
$this->mail->send();Send the email.