Warning: Address is not in a.b.c.d form

[step]

I'm getting the following warning :

Warning: Address is not in a.b.c.d form

The piece of code that seems to cause this (the last line - 4):

$domain = 'http://'.$SERVER_NAME;
$To = $domain.$REQUEST_URI;
$From = $HTTP_REFERER;
$REMOTE_HOST = getHostByAddr($REMOTE_ADDR);

does anyone have an idea why this is happening and what I can do about it?

thanks

stepan

[theeper]

getHostByAddr() requires an IP to be passed to it. Check the value of your $SERVER_NAME variable and make sure it is an IP.