Email Filtering Solution

E.F.A. stands for Email Filter Appliance, and is born out of a need for a cost-effective email virus & spam scanning solution after the ESVA project died The idea about E.F.A is to create a (virtual) appliance for spam fighting using Open Sourcetools. An E.F.A. filters emails before it reaches your email server, keeping inboxes free from spam, viruses and other malicious content.
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Grey Listing

Grey Listing- SQLgrey is a postfix policy service implementing a grey-listing policy. Its goal is reducing the SPAM reaching user mailboxes

Content Filtering

Content Filtering removes potentially malicious payloads from email such as executable files, script tags and many more.

Spam Detection Network

Spam Detection Network Pyzor and Razor are leading Open source spam detector tools used to detect and block all the unwanted spam.

Web Interface

Web Interface is powered by MailWatch to give Power web interface for email management.


CentOS is the system OS used to provide a robust open source ecosystem for the end users.

Anti-Mail Bombing

Anti-Mail Bombing protects against Denial of Service attacks and Mail Bombing that can cripple you email.

Technical Specification


  • High performance email filtering appliance
  • Automatic updates and system monitoring
  • Option to enable as an email server
  • Easy to use web interface
  • Highly configurable
  • Scalable


  • After sales managed services
  • Proactive system monitoring
  • Automatic updates

Filtering Functions

  • Anti-Spam
    • Header tests
    • Body phrase tests
    • Bayesian filtering
    • DNS Block lists
    • Grey Listing
    • Watermarking
    • Character sets and locales
  • Image Spam detection
  • Automatic address whitelist/blacklist
  • Manual address whitelist/blacklist
  • Collaborative spam identification databases
  • Anti-Virus
    • ClamAV
  • Anti-Mail Bombing
  • Anti-Phishing
  • Content Filtering – anti fraud detection
  • Reporting
    • By user and date showing sender, recipient, size and subject
    • Details of all spam, viruses and filtered content
    • Exchange Integration for user verification