"From: ".$agent_site_url."\r\n".
"Via: ".$_SERVER['REMOTE_ADDR']."\r\n".
"Forwarded: ".$_SERVER['REMOTE_ADDR']."\r\n".
+ "X-Real-IP: ".$_SERVER['REMOTE_ADDR']."\r\n".
"X-Forwarded-For: ".$_SERVER['REMOTE_ADDR']."\r\n".
"Client-IP: ".$_SERVER['REMOTE_ADDR']."\r\n"
)