I've been a MW Pro user for many years and used the free version before that. Great program. Not sure about the free version, but in the Pro version, you need to empty the recycle bin once in a while and you should clean out the block list periodically or the program might start misbehaving. This happened to me, and to others. Completely agree that keeping blocked addresses for any length of time is not useful at all. My ISP, without notification, decided to put in an automatic spam filter (Iron port 1050M). There is no opt out, and daily I get an email listing the hundreds of spam emails. Just hope your ISP doesn't do the same, because using Mailwasher is so much faster than deleting from a web page. Now I am forced to visit the web page to select the spam messages I want to report, mainly phishing emails, but some others as well. I am just hoping that my ISP doesn't deide that they need an earthlink-type permission system with no opt out.