SpamPal is a free mail classification program that can help separate your spam from the mail you really want to read.
SpamPal sits between your email program and your mailbox, checking your email as you retrieve it. Any email messages that SpamPal considers to be spam will be tagged with a header.
Simply configure your email client to filter anything with this header into a separate folder and your spam is no longer be mixed up with the rest of your email.
SpamPal requires:

• Windows 95, 98, ME, NT, 2000, 2003 or XP.
• A POP3 or IMAP4 mailbox.
• A standard email program such as Outlook, Outlook Express or Eudora.

AOL, Hotmail, Yahoo, Juno or MSN.