MailWasher

MailWasher is an anti-spam desktop tool that lets users preview and filter emails before they reach the inbox. Compatible with popular email clients (Outlook, Thunderbird), it identifies spam or suspicious messages using advanced heuristics and user-defined blacklists. A “bounce” feature fakes a return-to-sender, discouraging spammers. Users can train filters over time for better accuracy, whitelisting known contacts. Real-time blackhole list checks add an extra security layer. With both free and pro versions, MailWasher is popular among individuals and small businesses wanting direct control over spam detection at the client level.