ChoiceMail One   
http://www.digiportal.com

ChoiceMail is a spam-blocking system based on the premise that all incoming email is assumed to be spam until senders have obtained permission (called registering) to send you email. Until they do so, mail from unapproved senders will not appear in your email application. Unapproved senders are automatically offered the opportunity to register. If they do so you are notified so that you can choose to approve (or not) all future emails from that sender. You can also easily preapprove your existing contacts. The registration process requires manual intervention by the sender, thereby eliminating all automatic spamming systems. When our system tray icon flashes, you've got legitimate mail.

Email Redemption for Outlook   
http://www.emailredemption.com

Join the Internet's Spammer-Free Community - Restore Your Email Freedom! Finally- No-Guess, Zero-Error Spam, Fraud and Phishing Protection! The Email Redemption Community (ERC) is a self-regulating email community. Email freedom is maintained using simple rules that are strictly enforced. These rules create a unique community in which spammers cannot survive. As a result, ERC members enjoy open, risk-free emailing. ERC is the only available zero false-positive / zero false-negative email protection solution. This means that you get all, and nothing but, legitimate email messages. Unlike all other email protection solutions, ERC guarantees that you will never miss legitimate email messages. Email Redemption is backward compatible and allows ERC members to continue exchanging emails with non-members, safely: in addition to its safe community features, Email Redemption allows the user to choose his/her safety levels for communicating with non-members. The Email Redemption software is purely client software and does not require the intervention of your system administrator to install, configure and run.

Emjysoft Anti-Spam   
http://www.emjysoft.com

Block 99% of spam, viruses, spyware and phishing attempts before they reach your computer Emjysoft Anti-spam stop spam and dangerous emails containing viruses, spyware, and identity-theft schemes. His user friendly-interface makes it a simple, powerful, fast and safe tool. Protection for all email clients and servers ! Automatically updates from the Emjysoft server The Anti-spam database is updates every days.

MouseTrap   
http://www.emousetrap.com

Anti-Spam, Anti-Junk Program using confirmation message to authenticate senders. MouseTrap is the mediator between your e-mail program and your mailbox. No more can unsoliciated e-mail be blindly accepted by your e-mail program. Watch the amount of junk e-mail be drastically reduced in no time. MouseTrap downloads your e-mail and checks each message to be from an authorized sender or not. Messages that are from authorized sources are made available for your e-mail program to load. Senders that are not yet authorized are sent a message automatically from MouseTrap simply asking them to reply to the message. Upon receiving the message, the sender is now authorized to send to you. MouseTrap works with any POP3 mailbox from your Internet Service Provider and any e-mail program that reads POP3 e-mail (Outlook, Outlook Express, Eudora, Netscape, Pegasus...).

GFI MailEssentials for Exchange/SMTP   
http://www.gfi.com

GFI MailEssentials for Exchange/SMTP is a server based anti spam, anti-phishing & email management solution for Microsoft Exchange Server & Notes/SMTP servers. Over 98% of spam and phishing mail are caught before they reach the mail server, no need to deploy client software. Its advanced Spam detection technology is based on the following key features: Bayesian filtering technology (Over 98% capture rate with Bayesian alone!). Downloads updates to spam profile database. Mail header analysis & keyword checking, 3rd party DNS blacklists (DNSBL) checking, Foreign language spam blocking, Automatic whitelist management, Custom blacklists. GFI MailEssentials includes comprehensive anti-phishing capabilities; protects users from phishing emails by detecting and blocking them before they reach the recipient’s mailbox. Emails originating from, and terminating at the network are processed by advanced technologies built in GFI MailEssentials, maximizing spam capture rate whilst minimizing false positives. Other features of GFI MailEssentials include: Disclaimers, mail monitoring of particular email addresses, centralized mail archiving to database, mail reporting (e.g., top mail users, spam filtering reports etc...), POP3 downloading, auto replies with variables/fields, fake non-delivery reports, seamless integration with Exchange Server 2000/2003 & 5.5 and more!