In short, the spammer was sending spams, his spam was hitting spam box at hotmail..
He created millions of hotmail accounts and then sent emails to these...
Then he logged into these accounts and marked his emails as "not spam"
Which made the anti spam filters of MS crazy...
More
He created millions of hotmail accounts and then sent emails to these...
Then he logged into these accounts and marked his emails as "not spam"
Which made the anti spam filters of MS crazy...
More
PHP:
http://www.esecurityplanet.com/news/article.php/3888571/Microsoft-Sues-Spammers-Who-Abused-Its-Spam-Filters.htm