Free antispam software for windows

Uses cooperative processing to defeat spam. Automatically updates SPAM list from central server. Will periodically poll your mailbox for spam and automatically Archive and delete spam!

hermes is an anti-spam solution that will help you get rid for good of (most) spam messages hermes is an anti-spam solution that will help you get rid for good of (most) spam messages.
hermes is a SMTP proxy. What makes it special is that it can be used to stop spam using a combination of the following techniques:
- SMTP banner delay
Most spammers will start sending data as soon as the connection is open, without waiting for the SMTP banner. What we do is delay this banner and if we have data waiting before we print it, we drop the connection.
- Throttling
hermes will process incoming SMTP commands at a slow pace. Most spammers have very little patience, so they will stop sending an email if its taking too long to deliver.
- Greylisting
Greylisting is a process that will delay incoming mails for some minutes before allowing them to be delivered. As most spammers will not resend their messages, you will not receive them. If you want a more technical description, scroll down to read a greylisting description.
- DNSBL
As of hermes 1.2 you can now configure hermes to reject emails coming from ips listed on your favourite DNSBL, using the rbl_domain option.
Main features:
- Multiplatform: hermes runs on Windows, Linux and Solaris
- Transparent: Although clients will connect to hermes, hermes wont display any message of its own or alter in any way the communications with your real mail server, except at the moment of greylisting.
- Efficient: We have gone to great lengths to make hermes as efficient as possible, both for your computer and for the SMTP server that it proxies.
- Configurable: hermes is highly configurable, from greylisting time to logging method and everything in between.
- Extension friendly: We support most SMTP extensions such as SMTP-AUTH and STARTTLS.
- Compatible: You can use hermes in combination with other techniques such as nolisting or Bayesian Filtering either on the client side or on the server side (or both if you prefer). You can also use fakehermes to fake a secondary smtp server and further reduce your spam.

Sinapsi Antispam 3.4.8 is a software based on an Heuristic Analysis. Frequently emails are not Spam but only "False Positives". Imagine what can happen if your Antispam Software deletes an important email message, just because his imperfect analysis detect a "False Positive". Sinapsi Antispam solves your problem! Sinapsi Antispam is a security software that protects you from spam.

No Hawkers - Antispam is a peer-to-peer spam stopping solution.
Using the same community technology that makes other products some of the largest sharing communities in the world No Hawkers - AntiSpam links you into every other person in the world using the software. You receive second by second spam updates, spam tollerance control and the ability to fight back against spam by being able to send your own received spam messages back to the network to be reported to others.
Best of all No Hawkers - AntiSpam requires no setup you simply install it, let it detect your mail accounts and have it sit in your task bar doing the work for you. You dont have to setup filters or keywords or be a spam expert in any way.
Are you using another spam filter that catches 90% of your spam? thats fine, you dont even have to uninstall your original software, just install No Hawkers - AntiSpam and it will supplement your original software giving your PC more stopping power.

Comodo AntiSpam Desktop 2005 is an intuitive, easy-to-use, client-based software product that eliminates spam forever from the computers email system. No license fees - No charges - No more Junk Mail!! Just register and install to start enjoying a 100% clean inbox.
Main features:
- Total Spam Elimination
100% spam - free inbox using proprietary Passcode Authentication Technology - an active filtering algorithm that authenticates the SENDER of each incoming email message, eliminating spam once and for all!
- No hassle set-up
Simply install AntiSpam and then begin enjoying spam free email. Comodo AntiSpam features simple plug-and-play installation with no tortuous learning sessions and no filter rules to configure.
- Sender based authentication
The strongest safeguard available!! Comodo AntiSpam is not reliant on flaky heuristic systems or ill maintained external white lists ? you control exactly who can send you mails ? its your inbox, lets keep it that way.
- Thwart the Spam Bots
Every time you receive a mail from an unauthorized sender, AntiSpam?s advanced Challenge-Response system alerts the sender to authenticate a non machine-readable graphic containing your authorization code. Spam Bots have no way to correctly answer these mails, ensuring you only ever receive confirmations from genuine contacts.
- Works with your existing setup
Comodo AntiSpam is compatible with all popular email clients, including Outlook, Outlook Express, Netscape Messenger, Eudora or any other POP3/SMTP email client accessing POP3/SMTP email accounts.
- Automatically authenticate your address book
AntiSpam can import your email address book and automatically add the contacts to your ?allowed sender? list ? avoiding the need to manually authenticate your existing list of friends and colleagues.
- Instantly migrate custom black and white lists
With CAD2005 you can also import any existing black/white lists you may have used in the past. Furthermore, you can download extensive, pre-formatted lists from Comodo servers.
- One click Bandwidth Optimization
Whether you have a 56k Modem or a high speed T3 connection, CAD 2005 allows you to fine tune the amount of bandwidth used by the program ? ensuring internet and mail services operate at the maximum speed possible for your connection.
- Pro-active Spam defense
Take the fight to the spammers!! When spam reporting is enabled, CAD 2005 will automatically send a ?spam report? email to the postmaster of the spammer?s domain.
- Maximum Protection ? Minimum Drain
Comodo AntiSpam eliminates all spam without hogging valuable system resources. Unlike some antispam systems, it has a minimal resource and memory footprint and operates in the background- allowing you to access your email and run all your usual programs without bringing your system to a standstill
- Independent Authentication Database
Stores the addresses of your friends (allowed senders) and foes (blocked senders).
- Independent Quarantine Database
Allows users to view, analyze and sort messages that are pending authentication ? facilitating instant, preemptive authentication of all messages.
- Protects all your email accounts
Nowadays, people have become used to having multiple email accounts. Comodo AntiSpam can protect unlimited e-mail accounts from a single installation ? providing you with a single point of control over your entire anti-spam policy.
- Stay spam free WHEREVER you access your mail from
Our Server Synchronization feature allows you maintain spam?free email access from any remote computer with AntiSpam installed. If you alter rules on one machine, they are automatically transposed onto any machine you access mail from - you never lose the current state of your Passcode Authentication.
- Never miss a message
Audio alerts tell you exactly when a message has been quarantined ? choose any sound you want
- Failproof
Configurable multi-attempt system allows genuine friends to incorrectly supply the passcode and still be allowed on to your white list on the second or third attempt
- E-Commerce friendly
Auto-authenticates purchase-receipt messages, ensuring you never miss vital order confirmations from major online retailers.