Protection from unwanted e-mails
With the Merak Instant AntiSpam solution you protect your employees and customers against unwanted e-mails, so-called Spam mails. Instant AntiSpam filters all e-Mails according to your needs, marks then and puts them in a special Spam folder on the mail server.

The advantage of the direct integration of an AntiSpam solution in the mail server is the fact that bad e-mails don't have to be loaded from the server, the Spam administrator can learn and supervise the system, and that the AntiSpam works also by WebMail and not only on the PC in your office

Technology
Merak Instant AntiSpam unifies different ideas to avoid spam mails: Bayesian filter, Spam Assassin engine and Challenge Response.

Bayesian filter
Bayesian filter analyzes the content of an e-mail and computes the probability that an e-mail contains too many unwanted words. This can become very difficult, because certain words are not disturbing some people but other's do. Therefore an adaptive data base is used. It can teach and optimize your system, similarly to a system with artificial intelligence.

Spam Assassin
is using different well-known tests and methods, that analyze e-mail header and the content of an e-Mail and computes a value, which indicates, how probable it is, that the e-Mail is wanted or not. The integration of Spam Assasin in the Merak Mail Server is 50 times faster than the original Spam Assassin (trademark) engine. More information about Spam Assassin you can find here:www.spamassassin.org

Black & White list
Each user can use its individual Black & White list. With each e-mail the user can decide, whether the sender is good or bad and adds him to the appropriate list. With the Challenge Response this procedure can be fully automated.

Challenge Response
If the first 2 stages (Bayesian filter and Spam Assassin rules) do not provide enough accuracy, with the Challenge Response system you can reach an almost 100% filtering. On the one hand e-Mail addresses, that are sent through this Merak Mail Server, can automatically fed in a White list. The next time the AntiSpam engine receives an e-mail from this e-Mail address, it knows the fact, that this comes from "a friend" and accepts this e-mail. Additionally still another mechanism can be activated, which makes it possible for unknown senders to legitimize itself over a web site. They are then registered also in the White list.

Daily AntiSpam data base update
Spammers are bad guys. They always develop new strategies of spamming. With the daily update of the Spam data base you have guarantee that your protection is up to date. The update is comparable with an anti virus update.

Application

The Spam folder
Instant AntiSpam saves an e-mail, which was recognized by the Bayesian filter or Spam Assassin engine, in a separate folder named Spam. The supposed Spam Mail is not just deleted or received within the Inbox. (could be configured in such a way. The e-mail becomes then for example a special subject mark: [ Spam: 95% ])

The user can move Spam e-Mails from his Inbox into the Spam folder, not recognized correctly yet. The same way he can move wrong treated good e-Mails (false positive) from the Spam folder into the Inbox. Afterwards the indexing is started and the system learns these samples.

The Spam file can be configured in three ways:

• by WebMail

  

• Instant Messenger

  

• IMAP folder within outlook, eudora or other IMAP e-mail client

Self learning mechanism
Merak Instant AntiSpam can be operated also in "self learning" mode. Thus the system learns from errors. The user teaches the system, by reconducting information to the AntiSpam system. Autoupdate loads daily (like AntiVirus) the Bayesian Spam data base to your system.

That complete Merak Instant AntiSpam solution is very flexible and makes it possible to combine the Bayesian filter, Spam Assassin engine, Challenge Response and static filters. e-Mails can be deleted, rejected, its Subject changed (for example: [ Spam 95% ]...) or for further processing it can be marked as Spam.

The Spam administrator
With the new idea, that Spam Mails remain on the server, there can be used a new, central administration. With the Instant Messenger a dedicated user can configure now the e-Mails and Spam Mails of other employees. So for example the secretary manages the Spam Mails of her boss. This Spam administrator can move easily the, as Spam marked "good" e-mails (so-called false positive) into the correct Inbox or the Black and White list.

Merak Instant AntiSpam is a very efficient, adaptive and versatile option of the Merak Mail Server. It protects you and your users against unwanted e-Mails. Now and in the future (ensured with the daily Spam data base and Spam Assassin filter update) Instant AntiSpam offers a high level of protection.

If you don't want get rid of your Exchange server or any other mail server, use Merak Instant AntiSpam as upstream Mail Security server.

technologies:
Bayesian Filter
Spam Assassin
Black & White List
Challenge Response
AntiSpam database
Greylisting

benefits:
autolearning system
central administration
individual
high efficient
fast

configuration by:
WebMail
InstantMessenger
IMAP folder