- First your
domains "MX" Record (Mail Exchange) must be set to point
to our systems.
- Incoming mail for your
domain is then routed directly from senders through our scanner.
- Messages containing known
Spam or containing a virus are automatically blocked.
If a message appears to be Spam but
the system can not be certain then delivery is allowed to proceed,
however the system will clearly identify the message as probable
bulk email by placing " [
SPAM ] " in the subject field. Allowing you the
option to simply delete or review the message.
If a Virus is blocked from being
delivered, the system will send you a message that a virus was
blocked, what the virus was and who the sender was.
Some of the Scanning
Methods our Scanner deploys.
Blacklisting of Websites & Domains:
We maintain an up to date list of
the largest and most aggressive known spammers.
Keyword Scanning of Incoming Emails:
Our scanning methods include a
scoring system such that emails are scored based on a number of
criteria. If the score is above a threshold, then that email is
flagged as Spam. (Both the body of the message and the subject of
the message are analyzed.)
We monitor email traffic through
the Internet and use checksum technology to keep track of the
number of times a particular message has appeared on the Internet.
If a message has appeared over a certain number of times, it is
categorized as known Spam. Checksums of known Spam messages are
utilized by the scanner to block Spam messages.
Message Authenticity Checking:
Several algorithms are utilized to
verify the authenticity of a message. Some of these are simple
checks to verify that the “from address” is authentic. Some
are more complex relating to SMTP protocol.
A list of Domains, IP’s, and
email addresses known to send bulk email are maintained and
Utilized to stop denial of service
attacks as well as dictionary based Spam attacks.