[wp-hackers] Trackback Spam Fix

[Elliott Bäck]

As far as I know, the trackback form doesn't verify that the trackback 
URL resolves to the host IP sending the trackback, which in my opinion 
and experience, is the cause of most or all of the trackback spam 
currently getting posted.  I know that in theory trackback can be send 
by a server of behalf of someone else, but I know of very few 
implementations that work that way.

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Thanks,
Elliott C. Bäck

607-229-0623
http://elliottback.com