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Email Filtering Answers
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Filtering Answers |
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Architecture
Q): What is the reliability of your network?
A): Our global network consists of several, geographically
disperse, data centers. Each data center is redundant in
itself and every data center is redundant of each other.
We guarantees 99.999% uptime and has a historic uptime of
100%.
Q): Will there be a delay in the delivery of my email?
A): Due to the way we globally load balanace our network,
we currently are able to process a message in less than
1/10th of a second. As a client, you will not notice any
delay in the delivery of your e-mail.
Spam Filtering
Q): How do you know which messages are spam email?
A): Our junk mail 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.
Q): What happens to the spam email?
A): As the administrator, you have four options in
regards to the junk.
The first, and most popular, option is to leave the junk
e-mail on our network. As we catch the junk e-mail, we create
a temporary junk e-mail box for each of your users. We then
notify each user that they have junk e-mail on our server
and we give them a link to a web-based control panel where
they can check it. As the administrator, you can set the
notification interval. We hold the junk e-mail on our network
for 30 days before it is deleted.
The second option is to redirect all the junk mail to a
single e-mail address. For example, spam@yourcompany.com.
The third option is to have us insert an x-header. The junk
e-mail is delivered to your mail server giving you the ability
to reroute the e-mail via the x-header variable.
The fourth option is the ability to modify the subject.
For example, you could insert the word JUNK before the subject
so that the individual users could set up their own filters
at the e-mail client level.
Virus Filtering
Q): I already have virus protection, why do I need yours?
A): You may or may not need our virus protection. For
this reason, we offer our services with and without virus
protection. Typically our clients already have some sort
of virus protection on their network including their e-mail
server and client desktops.
Due to the fact that the majority of viruses are spread
via e-mail, our virus filtering is simply two more layers
of protection. Our partners, Trend Micro and Sophos, maintain
a global footprint on the latest virus activities insuring
our customers the best protection available on the market
today.
Q): What virus engines do you use and why?
A): We have partnered with Trend Micro and Sophos
in order to offer enterprise level virus protection. Typically
our clients use Norton Anti-Virus or McAfee on their local
networks. By enabling our e-mail virus protection, our clients
receive three levels of anti-virus protection.
Quarantine
Q): How does the Quarantine work?
A): The Quarantine is available, via web-based control
panel, to Administrators at the domain level. Any e-mail
message that has been filtered by the Attachment Filtering
will be deliverd to the Quarantine for review. Messages
remain in Quarantine for 30 days. Administrators can view,
deliver or delete messages in the Quarantine.
Black & White Lists
Q): What is a black/white list?
A): Black lists are simply rules set up to BLOCK messages
based on domain name or e-mail address. White lists ALLOW
messages to be delivered based on domain name or e-mail
address.
Q): How do the administrative black/white lists work
with the user level black/white lists?
A): Our system allows administrators the ability to
create master black and white lists on a per domain basis.
Administrators can also give their individual users the
ability to create individual custom black and white lists.
Administrative lists always take precedence to user-level
lists.
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