ISP blocked due to abuse?

Well, it seems today that I'm now unable to post anything over at the 4chan imageboards, otherwise I get this message:
"Posting from your ISP has been blocked due to abuse. [More Info]"
I can still browse the site, all the images and threads load fine, I just can't post. What gives? I've never posted spam or porn.

>>900
have fun waiting bro, until now in my 4chan "career" I mailed him a hundred times about various problems and not a single automatic response was given to me... i really dont see why he even has an email lol