http-stats:
HTTP/1.1 X-Error-Info header field

The X-Error-Info field is NOT a standard HTTP header field and may not be supported by all clients.

Common X-Error-Info header values:

Sample X-Error-Info web server response:

HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Content-Length: 3965
X-Error-Info: Host name received is not for this web site
Date: Fri, 30 Jul 2010 16:57:50 +0000

<!DOCTYPE html PUBLIC "-//W3C//DTD ...
...
...

Other common HTTP headers

Other less common headers