Blue Frog Anti Spam extension

Blue Frog actively fights spam and makes spammers leave you alone. The Blue Frog extension automatically reports spam reaching your Gmail, Hotmail and Yahoo accounts directly from your Firefox or Internet Explorer. Blue Frog desktop client fights spam by posting complaints on the sites advertised by the spam you receive. Blue Frog protects your email accounts or your entire mail domain by making spammers remove your from their mailing lists.