Within a custom module I am trying to send the below so that an email is sent but I get the error The submitted from address () is not valid. This from email address does exist so why is it giving me this error?

Thanks,

John

$message = array(
'to' => 'username1@domain123.com',
'subject' => t('Example subject'),
'body' => t('Example body'),
'headers' => array('From' => 'support@domain123.com'),
);
drupal_mail_send($message);

--
John J. Mitchell