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The Spam Email Filter automatically eliminates "junk" e-mail or "Spam"
from each users mailbox, protecting workers from unwanted distractions
and interruptions. With the ever-increasing amount of unsolicited e-mail
arriving daily, protection is an important means of saving time and
staying focused on important work at hand.
As e-mail passes through the mail routers, our Spam Email Filter automatically
scans inbound e-mail and separates out any Spam found.
The Spam Email Filter is a system that we has developed in house. Spam
is filtered in a multi-step process. The first step is a collection
of millions of “bait” e-mail addresses. These e-mail addresses are used
to actively look for Spam. Spam is captured and run through a process
in which a fingerprint is created and added to a master database for
each message.
Next, as each new customer e-mail message enters the our network, it
is fingerprinted and cross-reference in the database to see if there
is a match. If there is a match, the message is marked as Spam. If there
is no match, the message proceeds to the next step in which it is run
through a series of tests where different aspects of the message including
the header, subject, and content of the message are analyzed. These
tests give the message a score that in turn determines if the message
is Spam. Spam messages are fingerprinted and added to the database.
Clean messages are queued for delivery to the client. This process,
on average, takes less than a second to perform.
Administrators have many options in regards to the filtered Spam Email:
- SpamTank: With the most popular option being the
SpamTank, Spam is held in a user level quarantine on the Global Gateway
or the Local Messaging Router. As Spam is identified, temporary junk
e-mail boxes are created for each user. Users are notified that they
have junk e-mail on the server and are given a link to a web-based
control panel where they can check it. The administrator sets the
notification interval. Spam is held in this user level quarantine
for 30 days before it is deleted.
- Redirection: This option allows administrators
to redirect all Spam to a single e-mail address. For example, Spam@yourcompany.com
- X-Header: This option allows administrators to
insert an x-header. Rules can be written on the destination mail server
to reroute mail via the x-header variable.
- Subject Line Modification: This option allows administrators
to modify the subject line of Spam messages. For example, the word
JUNK or SPAM could be inserted before the subject so that the individual
users could easily identify Spam messages.
Spam Email Filter Benefits:
- Proprietary Filter process catches 98% of Spam
- .00001% false positive rate
- Automatic Filter with no maintenance headaches
- Reduces the time-distraction of clearing out unwanted e-mail
- Far less expensive than maintaining own onsite spam Filter system
- Implementation in minutes with a simple change in DNS configuration
- Reduced load on IT staff and mail servers
Q): How do you know which messages are spam?
A): Our junk email Filter is a system that we have
developed in house. We filter spam in a three-step process.
First we use what we call "bait" e-mail addresses. We have hundreds
of e-mail addresses that we use to actively look for spam. We take those
spam messages and run them through a process that we've created where
we create a fingerprint for each message. Those fingerprints are added
to our database.
Secondly, when new e-mail enters our network, we fingerprint each message
and cross reference our database to see if there is a match. If there
is a match, the message is marked as spam.
If there is no match, we then run the message through a series of test
in which we look at different aspects of the message including the header,
subject, and content of the message. These tests give the message a
score and if that score hits a certain threshold, we mark that message
as spam.
This whole process takes less than a second to perform.
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