[geckoday]

That method will alter the from name for all emails sent even if the from is supposed to be the customer. The biggest problem areas will be GC's, send to a friend and wishlist. Contact emails will be a problem too. If you reply to the customer they will get a reply email that will show as from their name but with your company email address. Try this instead. Still in func_send_mail just a couple of lines earlier find this:

	$m_from = $from;

and replace it with this:

  switch ($from) {
    case $config["Company"]["users_department"]:
    case $config["Company"]["site_administrator"]:
    case $config["Company"]["orders_department"]:
    case $config["Company"]["support_department"]:
    case $config["Company"]["newsletter_email"]:
      $m_from = $config["Company"]["company_name"].'<'.$from.'>';
      break;
    default:
      $m_from = $from;
  }

This uses the company name from the admin configuration for the email display name.

Works on 4.0.14 and 4.0.18 and probably most any 4.0 or 4.1 version.