TNL Antispam will check your POP3 e-mail box and weed through your incoming mail messages. There are several processes that TNL antispam uses to eliminate spam from your inbox. Using a combination of filter and challenge & response technology TNL Antispam proudly offers an unheard of false-positive rate (legitimate email falsely marked as spam), with minimal user intervention..
TNL Antispam is a sophisticated, yet affordable solution to the growing problem of junk email.
Many have toyed with the anti-spam program that utilizes public blacklists, whitelists and/or filters, and most walk away dismayed about how much email is lost due to false positives (mistaken for spam). Even some of the best program out there is time consuming to use. Many people have had the unfortunate experience of their website getting added to a public blacklist by mistake and had to deal with the time-consuming task of getting taken off these lists.
TNL Antispam is different, TNL Antispam uses an automated challenge/response technology, which offers a more concrete way to weed out that unwanted email.
TNL Antispam Features:
Works with any Standard POP3 e-mail Account.
Works with multiple email accounts.
Allow or Disallow (Friends/Banned) full email addresses or use wildcards for partial addresses or entire domains.
Filters, create special filters to automatically delete emails, add emails to your friends list, add them to your 'banned' list or Hold the mail for manual review.
Quick and Painless Setup
Easily view held messages for manual review
Customizable authentication email.
Manages spam with minimal user intervention.
Ability to import popular address list formats to friends list (Outlook Express, Text Import)
Avoids Auto-Responder Loops (This is where a challenge is sent out in response to an autoresponder, causing an endless loop, clogging mail systems)
View messages directly through TNL Antispam.

The license of this software is Free Trial Software, the price is $19.95, you can free download and get a free trial.