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The spam email filtering system 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 system 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 Filtering Benefits:
- Proprietary filtering process catches 98% of Spam
- .00001% false positive rate
- Automatic filtering with no maintenance headaches
- Reduces the time-distraction of clearing out unwanted
e-mail
- Far less expensive than maintaining own onsite spam filtering
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 filtering 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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