Free and Paid E-Mail Spam Filtering Services
We hate spam as much as the next person and we have made some
major changes to our network to help combat Spam. We have always
used Spam Cop domain/IP based spam filtering to filter out known
spammers and this has worked fairly well for a long time but times
have changed and spammers are getting more sophisticated. Now
spammers can send emails using random email accounts, cloaked IP
addresses and forged headers to get around the normal filtering
methods. This has left almost every hosting company and ISP looking
for ways to fight back. It has been a long drawn out fight but the
good news is.........
Basic Spam Assassin Spam Filtering Services (Free)
We have been offering our Free Spam Assassin filtering service
for 2 years now and many enjoy a large break in the incoming junk
mail they receive everyday. Spam Assassin is a free yet powerful
spam filtering service that comes standard on each hosting account
and just needs to be activated by you when you are ready to start
filtering. Scroll down to find out more information on how to active
this for your hosting account.
How Spam Assassin protects you from getting spam.
| Technique |
Description |
| Keyword
scanning of emails |
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. |
| Single Layer
Virus Blocking |
The Basic Spam
& Virus Defense System uses a powerful single process
called ClamAV to maximize protection against known viruses. |
Advanced Spam & Virus Defense System (Paid)
The Advanced Spam & Virus Defense System provides comprehensive
spam-blocking for your organization. The algorithms and methods used
by the Advanced Spam & Virus Defense System are the most
comprehensive and most advanced in the industry. The Advanced Spam
& Virus Defense System even includes Bayesian analysis which has
been shown to be the most effective and most accurate method of
blocking spam.
The methods and techniques used by the Advanced Spam & Virus
Defense System are constantly updated (via hourly Updates), to keep
up with changes that spammers and virus writers are constantly
making.
The Advanced Spam & Virus Defense System provides a number of
parameters that can be adjusted and tuned for your specific
environment. These parameters do not have to be adjusted to obtain
extremely effective spam blocking, but are available for advanced
users.
The Advanced Spam & Virus Defense System is a highly intelligent
piece of hardware that handles all the processing and filtering. One
simple change to the (MX) records (which we will do at no cost) and
your email is instantly flowing through this device. Because
Anti-Spam and Anti-Virus will no longer be processed on your server
it will free resources, increase performance, and decrease threats
on your server.
Learn More Here > http://www.barracudanetworks.com
Key Benefits of The Advanced Spam & Virus Defense System
- Increased Security - Virus/Spam that never reaches your server
means it will have a higher degree security.
- Lower Bandwidth Usage - Mail is processed and filtered before
it reaches the server, reducing bandwidth usage.
- Central OPS Updates - Fully managed updates handled by Our
In-House Administrators (daily).
- Ease of Use - We set up and manage the complete system, all
you do is enjoy getting less spam, protection against viruses
and spyware.
- Low Cost Implementation - starting as low as $2/month for each
domain hosted by gwdhosting.com
- Intelligent and Complete - 9 Methods of Spam Preventions and 3
Anti-Virus methods.
Some of the algorithms employed to block spam on our advanced
filtering service are listed below with a short description.
| Technique |
Description |
| Blacklisting of
websites & domains |
Central OPS
maintains an up to date list of the largest and most
aggressive known spammers. This list is maintained by both
Advanced Spam & Virus Defense System and other anti-spam
groups. This list is automatically updated. |
| Keyword
scanning of emails |
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. |
| Checksum
technology |
Central OPS
monitors email traffic through the Internet and uses
checksum technology to keep track of the number of times a
particular message has appeared on the Internet. If a
message has appeared very broadly, it would be categorized
as known spam. Checksums of known spam messages are utilized
by the Advanced Spam & Virus Defense System 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. |
| Rate controls |
Rate controls are
utilized to stop denial of service attacks as well as
dictionary based spam attacks. These are integrated and
automatic in the Advanced Spam & Virus Defense System. |
| Bayesian
Algorithms |
Bayesian filters
are personalized to each user and adapt automatically to
changes in spam. To determine the likelihood that an email
is spam, these filters use Bayesian analysis to compare the
words or phrases in the email in question to the frequency
of the same words or phrases in the intended recipient's
previous emails (both legitimate and spam). |
| Spam
Fingerprint |
Checking
Fingerprinting techniques examine the characteristics, or
fingerprint, of emails previously identified as spam and use
this information to identify the same or similar email each
time one is intercepted. These real time fingerprint checks
are continuously updated by Central OPS and provide a method
of identifying spam with nearly zero false positives. |
| Intention
Analysis |
Intention
Analysis is used to look at the objective or goal of the
email. If the objective of the email is to sell something,
try and have you click on a commercial link, or get you to
take a particular action that is indicative spam, the email
will be categorized as spam. |
| Dual Layer
Virus Blocking |
The Advanced Spam
& Virus Defense System uses two virus scanners to
maximize protection. This provides two layers for extra
safety. |
| Decompression
of Archives |
The Advanced Spam
& Virus Defense System unpacks and examines every
individual file within 17 different types of archives. It
also uses techniques to examine password protected archives. |
| File type
attachment blocking |
The Advanced Spam
& Virus Defense System allows you to block certain types
of files. Many of the commonly blocked file types,
frequently contain viruses, such as VB script (.vbs files).
These blocking methods have become industry standard in
order to provide additional protection. |
With the procedures and algorithms that All Spam Filters use we
feel that we can not force a network wide filter as some people
might not want all their junk mail deleted. The reason we have not
and will not activate this without each account holders approval is
we think this is a form of censorship and it is not up to us to say
what email you receive and what emails you don't.
A few things to keep in mind when using a Spam Filtering System
(free or paid) that nothing is 100% and there is a chance that valid
email could be tagged as spam and deleted just like some spam can
make it through as a valid email. We have been using Spam Filtering
on all our email accounts for 2 years with little to no False
Positive tags (good emails being deleted) but it can happen and you
need to consider this before setting up either the free or paid
services.
NOTICE: If you are looking for more ways to fight Spam please
visit our new article on Winning The War On Spam in our News
section. With the suggestions we have written out we have gone from
getting several hundred spam emails a day down to just a few. Just
think what our tips and spam filter services could do for your
inbox.
Click
Here to learn how to active your Free Spam Assassin Filtering
Service
Click Here to add our Paid -
Advanced Spam Filtering Service
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