Yahoo has recently quoted a study of the Fraunhofer Institute which concluded that Yahoo Mail and Hotmail have better spam filters than Gmail.
"The Fraunhofer Institute, an independent research firm, found that Yahoo! Mail users saw the least amount of spam out of the five providers tested, with nearly 40% less spam than Hotmail and 55% less spam than Gmail – meaning Gmail users in the study saw more than twice as much spam as Yahoo! Mail users."
If the results are accurate, then either Gmail's spam detection technology is no longer state of the art or Yahoo and Microsoft have dramatically improved their spam filters. Last time I checked, most of the messages from the inbox of my Hotmail account were spam.
