Spam and Virus Filter
Linux Spam Filter, Antivirus Software
We have created our own Enterprise-grade Spam and
Virus Filter that outperforms the "big-name" competition
and at a much better price of only $1495 plus $99/mo.
It blocks 98.5% of spam, offers White and Black lists and
we do the installation and configuration. You just
have to say "I don't want any more spam or user complaints
90% of most received email is spam! Our spam filter
typically filters out 98.5% of this spam so your people
will not waste their valuable time reading it, get
frustrated, or, worse, accidentally delete legitimate
email as spam or be tricked by fraudulent email or viruses.
Unlike some of our competition, you do not have to
"train" our filter. It already knows what to filter out.
The Spam Filter blocks or flags most spam
by context filtering (matching spammer phrases such as
"get rich quick"),
by known bad source IP addresses,
by Sender Policy Framework (SPF),
by checking Domain Signatures provided by Yahoo to
reject false claims that the sender is a Yahoo address,
by many other similar "spoofing checks", especially
rejecting external email claiming to be from your domain
and trusted associates,
and by known bad URLs in the message text.
The context filter recognizes common words and phrases that
appear in most spam Subjects, From, and To addresses,
as well as the body and elsewhere in the headers and
envelope. Our context filter is one of the most
sophisticated in the business and contains many thousands
of variations on common "come-ons",
The source IP address filter uses a
very large, frequently updated database of IP addresses from
known spammers, ISPs and organizations that allow their users
to send spam, "open mail relays" that are misconfigured
to allow spammers to relay spam mail through them,
and dial-up and residential
IP addresses that clearly have no administrative restriction.
Sender Policy Framework (SPF)
is a brilliant free Open Source invention that eliminates
spoofed mail. All a domain needs to do is add some
DNS (Domain Name Service) records indicating the IP
addresses of the mail servers it uses to send email out
to the Internet.
When we receive email claiming to be from aol.com,
eBay.com, SmartBank.com, or YourDomain.com we simply use
SPF to ask the real domain's DNS server if the sending mail
server's IP is one of the official mail servers of that
domain. If it is not then the email did not really come from
that domain -- it was spoofed -- and we block it. There is
no way for a spammer to evade it.
Join AOL, eBay, Hotmail, the smarter banks in the U.S.,
Switzerland, and elsewhere and others in putting SPF to work
for you with SPAM Cracker™. We also can help you
set up your own SPF DNS records so spammers cannot claim
to send from your domain (to others using SPF).
It does the lookup for
known spammer sending IP addresses as soon as the spammer
connects to your system. It can reject the email before
the spammer even
has a chance to waste your bandwidth with kilobytes of spam.
The SPAM Cracker can even add a rule to the firewall so the
ever connect to you again, thus saving valuable bandwidth.
You can control which domains to filter for spam/viruses
(Great for web hosting companies). The filter can be set
to flag the spam on the Subject line and deliver it rather
than block it entirely. Its many features are very
configurable to meet your needs rather than a
"one size fits all" mentality.
Tired of getting spam from Korea, Russia, China,
Brazil, Ukraine, or Romania?
We can block those top-level domains or all top-level
domains except for the ones you correspond with.
Tired of spam in a foreign language?
We can block that too.
Our Spam filter can also be configured to work with
No Guess Domains™.
On these domains, a list of valid recipients (mailboxes)
If any message includes at least X invalid recipients
the message is flagged as spam. This handles spammers who
will guess mailbox names and then send
hundreds or thousands of emails to those users at
a given domain. X can be set to >1
to allow for a mistyped address. Our Spam filter also works
seamlessly with our
Cracker Trap™ firewall.
If the number of invalid recipients on
a piece of email exceeds a preset number,
the sending IP is added to the firewall's blocked list
so they will not trouble you again.
The virus filter blocks known viruses by recognizing
their binary signatures.
Don't be fooled by cheap Virus filters that just check for
the easily changed text message that accompanies the real
Virus. Ours uses a frequently updated virus signature database
delivered to your system in a secure manner four times a
It also filters out dangerous extensions, such as .com and
.exe, thus preventing most new viruses from infecting you
even before they get into the world's master virus signature
databases. Thus, you are protected even the instant a
new virus is unleashed. Don't suffer with our competition, risking getting infected before they discover the new virus and add it to
their virus database.
The Spam and Virus filter may be installed either on your
Linux-based Firewall or on your Linux Mail server or on a
separate system that we can supply. If installed
on your Firewall or separate system it will work regardless
of whether your mail server runs on Linux, Unix, Windows,
Mac, VMS, or any other platform. The Firewall option requires
no reconfiguration of any part of your network, including
your upstream routers or your mail servers. It is ideal for
small firms to large organizations where distributed responsibility
and mixed platform multiple mail servers would make other
options inconvenient or impossible.
Its price is quite competitive and its abilities are second
to none. Because it runs on a very hardened Linux system,
it is unlikely to be compromised. Most Windows Viruses, as
the first thing they do, immediately will disable a Windows
system's Virus filter and Firewall. This would render your
network vulnerable not just to that virus but to any virus
or port-based attack.
Contact us at
or +1 770-662-8321
to learn more and stop spam now.