Inbox Cleaner
InboxCleaner is a small utility that connects to your POP mailbox and verifies your e-mail messages. Mail messages that are identified as SPAM are deleted before you download them with your normal mail application. This prevents you from downloading SPAM and clogging up your mailbox. ... But not only SPAM will be stopped, but also harmful Viruses and Worms will be identified and deleted before you download them.
http://www.simtel.net/pub/dl/64506.html - 1Mb - Download - Screenshot

xTang
xTang is a windows integrated mail program presenting your mail folders in the windows explorer. To aid in the changing of mail systems, xTang has routines for importing adress books and old mails from outlook and outook express. xTang has an advanced wysiwyg editor for html-mails allowing... Definition of message rules in xTang is easy and the rule system can identify e-mail coming from known or unknown senders - a powerful and simple way to prevent spam mails. ... Support for multiple mail-accounts is included.
http://www.kodbolaget.se/downloads/xtang.exe - 16Mb - Download - Screenshot

No Spam Today! for Workstations
No Spam Today! for Workstations was created for users of Outlook, Outlook Express and all other POP3 email clients to protect mailboxes against spam, malicious attachments and viruses. Acting between your mail client and your mail server No Spam Today! ... for Workstations with any POP3 mail client. ... Automatic spam protection for all your Outlook POP3 accounts. ... A complete one stop setup routine that installs one of the world's most advanced and thorough email spam filters on your PC in a matter of minutes.
http://download.byteplant.com/download/nospamtodaywst.zip - 6Mb - Download - Screenshot

Spam Alarm for POP3
Spam Alarm is a highly configurable and extremely efficient e-mail scanning software solution which can be tailored specifically to your system to remove the unsolicited e-mail. Spam Alarm utilizes our innovative multilevel filtering, statistical analysis of individual words and heuristic scanning.
http://www.dignitysoftware.com/files/spamalarm.exe - 4Mb - Download - Screenshot

KnockKnock
Anti Spam program eliminates unsolicited e-mails in your inbox. KnockKnock is a complete e-mail enhancement program and spam solution, and works with your current Email client. Easy to use administration features handles, multiple e-mail accounts on multiple servers. ... KnockKnock learns what's Spam from your normal activities and loves Spam; the more you get the better the Anti Spam Intelligence works. ... Anti Spam Intelligence stops unwelcome messages before downloading to your inbox. ... Easy total control, of all senders from accept, deny, or hold (pending) status.
http://knockmail.fileburst.com/kkv20.zip - 9Mb - Download - Screenshot

AGAVA AntispamServant
AGAVA AntispamServant is a trainable filter featuring message content analysis. AntispamServant is characterised by high-speed and efficient operation with all e-mail clients, and does not require them to be specially adjusted. AntispamServant is analysing the spam and non-spam message samples... AntispamServant: - applies a complex formula to deduce the summarized spam coefficient of the e-mail messages, thus preventing the problem of short-cut calculation; - accounts for the human error factor in the course of the training process and provides opportunities for subsequent correction; -...
http://www.antispamservant.com/download/antispam.exe - 1Mb - Download - Screenshot

VirusCop
VirusCop is a simple freeware Windows program for reporting virus spam, erroneous e-mail bounces and other spam. It allows you to paste in the headers from virus spam and the relevant ISP e-mail contacts. If you prefer, VirusCop can even automatically find the email complaint contacts for you. ... Spam that cannot be reported can be forwarded to another spam reporting service like SpamCop. ... There is also a bulk reporting feature to automatically send spam reports for large amounts of spam. ... The many included complaint messages can be easily edited to suit your particular tastes.
http://www.cybermatrix.com/download/vcsetup.exe - 773Kb - Download - Screenshot

Best Mail Server
Best Mail Server is an ultra fast mail server program. You can send mail from any mail client that is complaint with SMTP protocol using this server. You can also configure it to be your local mail server. It will accept mail on behalf of your users and store it, until your users will retrieve... A lot of security features and options that allow you to protect the server from DDoS attacks as well as safely block SPAM and spammers are built into the server. ... We also created mailing lists functionality in the server.
http://www.softheap.com/download/bestmailsrv.zip - 3Mb - Download - Screenshot

SpamBlocker
Spam Blocker blocks unwanted advertising messages on the mail server. It is a simple and convenient tool for preliminary analysis, blocking and deleting incoming advertising messages (spam) on the mail server. Spam Blocker helps to get rid of annoying email advertising by analyzing... Spam Blocker works with several mailboxes and allows users to configure spam filter settings for each account according to their purposes and needs. ... Spam Blocker checks all mail and receives the headings of all messages from the user's mailbox (email addresses, addressee names, message subject, etc.
http://spam-blocker.adscleaner.com/download/spamblocker.exe - 1Mb - Download - Screenshot

TNL Antispam
Spam is a growing problem and states are struggling to pass laws, but as most of us know most spam doesn't come from any particular state, or country for that matter. The internet has no borders and most spammers use tactics that prevent them from being traced in the first place. ... Many have toyed with the anti-spam software that utilizes public blacklists, white lists and/or filters, and most walk away dismayed about how much email is lost due to false positives (mistaken for spam). ... There are several processes that TNL Antispam uses to eliminate spam from your inbox.
http://files.tnlsoft.com/anonftp/pub/tnlsoft/tnlas_setup.exe - 4Mb - Download - Screenshot