druidbros writes "I read a great story about Data Mining on Truthdig.com. As I sometimes do I sent the test to a friend. To my surprise it was blocked by Yahoo (he has a sbcglobal.net email account). The message given by Yahoo was....(reason: 554 Message not allowed — UP Email not accepted for policy reasons. Please visit http://help.yahoo.com/help/us/mail/defer/defer-04.html%5B120%5D). Even when I removed the words Data Mining from the subject line it still wouldnt accept the email. What is going on? Here is the article.... http://www.truthdig.com/dig/item/20070809_inside_the_data_mine/"