The most interesting and hard to break CAPTCHA image so far..
Google Press Release emails marked as Spam by Gmail - False Positivies
Beware of email messages that have MP3 attachments.
Research shows that between 65% and 88% of emails received is considered to be spam. Spam continues to be a headache for administrators and end-users because spammers are constantly trying to stay one step ahead of anti-spam software vendors.