1 - Mail UnKnown Anti-Spam 1.532 Stop spam with Mail UnKnown. Mail UnKnown uses a Verify then Validate method giving you control of emails you receive. Emails are held until a sender is verified. Then you have the option to validate them as a sender you want to receive emails from. License: Time-limited Trial OS: Windows 9X/ME/2K/XP/2003 Size: 1295 KB