HTML MAIL feature is not working correctly. Some of the users are not receiving email. It is important as these are the account confirmation emails.
Error Message : "The mailsystem_html_to_text() function did not return any text. Please report this error to the Mail system issue queue."
I am trying to send a HTML email. The message body has some HTML Code. I am getting the above error and email is not sent to the user.
// Retrieve the responsible implementation for this message.
$system = drupal_mail_system($module, $key);
// Format the message body.
$message = $system->format($message);
// Send e-mail.
$message['result'] = $system->mail($message);