When I use cron for sending email notification all the messages seems are sent in the wrong order. I investigated the issue and found that e-mails sent via the function email_send_all() [core/email_api.php], which in its turn uses the email_queue_get_ids() [core/email_queue_api.php]:

/**

• Get array of email queue id's

• @return array
  */
  function email_queue_get_ids() {
  $t_email_table = db_get_table( 'mantis_email_table' );

  $query = 'SELECT email_id FROM ' . $t_email_table . ' ORDER BY email_id DESC';
  $result = db_query_bound( $query );
  
  $t_ids = array();
  while(( $t_row = db_fetch_array( $result ) ) !== false ) {
          $t_ids[] = $t_row['email_id'];
  }
  
  return $t_ids;

  }

All the messages are put in the database in a forward order. Unclear why they are retrieved in reverse order?