$HOST = $_SERVER['HTTP_HOST'];if ($HOST == 'webmail.mydomain.com'){$rcmail_config['skin_path'] = "skins/$HOST/";$rcmail_config['product_name'] = 'My Webmail';}else{$rcmail_config['skin_path'] = 'skins/webmail.anotherdomain.co/';$rcmail_config['product_name'] = 'Another Webmail';}