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Spam Blocker

Block Spam at the Network Gateway

VistaWiz's Free Spam Blocker uses advanced spam filtering to block spam at the gateway before it ever reaches the users.  Zero client installations and an intuitive GUI make it easy for administrators to: 

  • Leverage the best spam filtering techniques including Bayesian Filters, Razor, realtime block lists (RBLs), OCR for image spam and tarpitting
  • Provide individual quarantines for each mailbox
  • Filter SMTP, POP & IMAP

"Right away, spam was down 95%"
Brian Welker, Sunridge Properties

Spam is the bane of small businesses’ existence. It can not only bring viruses onto your network, but it can take over your computers and send spam to other computers.

And it impacts you in other ways. According to a recent study, the cost of spam messages to U.S. companies—in terms of productivity and the equipment, software and manpower to combat it—was upwards of $10 billion in 2004.

So the key is to stop spam before it stops you.

Our powerful Spam Blocker protects you with top-notch spam scanning and blocking at the edge of your network—before it can do damage or slow you down. Using the latest technologies, Spam Blocker transparently scans for spam, marks messages and intercepts emails. It requires no alteration of your network’s mail configuration and is constantly updated to guard against any refinements in trickery or techniques that senders create to get around other solutions.

Key Features:


  • Quarantine Digest—our Spam Blocker is optimized to make sure “good” mail is never mistaken for spam. However, if a “good” mail is ever identified as spam, VistaWiz Spam Blocker gives each team member in your company their own personal “quarantine” list. They can find that email without having to track down an administrator
  • Personal Passlist—users can designate certain email addresses as “good” without having to bother your IT person
  • Image based filtering — scans images within emails to stop this new type of spam
  • POP, IMAP & SMTP support
  • Reports give a comprehensive view of the spam environment on your network, including  the source of the spam and how much spam is received in aggregate and by user


How Spam Blocker works:

It uses a wide range of heuristic tests on mail headers and body text to identify "spam", also known as unsolicited commercial email.

Once identified, the mail is then tagged as spam for later filtering using the settings that are specified within VistaWiz.


Advantange VistaWiz offers over using SpamAssassin directly:
  • Point and Click Install
  • Installs Transparently
  • Requires no changes to your email configuration
  • No time spent on the command-line, researching settings etc.,

SpamAssassin typically differentiates successfully between spam and non-spam in between 95% and 100% of cases, depending on what kind of mail you get and your training of its Bayesian filter.

Specifically, SpamAssassin has been shown to produce around 1.5% false negatives (spam that was missed) and around 0.06% false positives (ham incorrectly marked as spam).


Need More Powerful Spam Filtering?

Try our industrial strength Commtouch Spam Booster

Key Benefits:
  • Filters over 98% of the spam
  • Lower false positives
  • Detects spam outbreak in real-time

Check out the Technical Description...