At the heart of CobaltShield is MailScanner, the most popular email gateway scanning software in the world. It is used at over 30,000 sites, protecting government agencies, corporations and educational institutions. It processes more than 750 million email messages every day, removing over 10 million viruses and identifying 300 million spam messages.


MailScanner acts as the “brain” of our email gateway, configuring and controlling the actions of our Mail Transport Agent, Virus Scanner(s) and spam Detection software.

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By redirecting the MX records of your domain name(s) to one of our dedicated anti-spam servers, your emails are screened and legitimate emails forwarded to your existing mailserver (or our shared mailserver if you already use this).

  • Email arrives at one of our filter servers from remote systems.
  • We check the remote system for vaildity before accepting the email.
  • The email is then analyzed (viruses, spam, phishing, etc.) and scored.
  • Legitimate email is then delivered to your system.
  • Users receive their mail as normal, but viruses, spam and dangerous content have been removed.

Click here for a free 14 day trial of the service!

We use multiple virus scanners, including ESET NOD32. Independant tests have shown it delivers the fastest, most effective and most proactive antivirus and antispyware software solution to eliminate viruses, spyware, adware, worms, trojans, rootkits and other malware.