client sent HTTP/1.1 request without hostname

what does this mean?

[tito]

hello, i've found on my error logs the following:

[Wed Jan 28 17:31:38 2004] [error] [client 2xx.****.xxx.x] client sent HTTP/1.1 request without hostname (see RFC2616 section 14.23): /
repeating several times...

what does it mean client sent HTTP/1.1 request without hostname?!?

thanks for help
tito

[fergusferrier]

Looking at the IP address rather than a host name?

[bird]

Most likely a broken robot. Since they can't harvest e-mail addresses that way, you're safe to ignore them.

[tito]

ok, thank you very much.