Anti-Spam, Virus Email Scanning, Email Content Filtering on CentOS Linux

Do you ever suffer sleepless nights due to thousands of spam /junk mail flooding your users mailbox every minutes?

As an administrator, one of our major task is spam fighting. When a high volume of spam attacks, you might even see the performance impact on hardware appliances, such  high CPU/ Memory usage that eventually caused equipment to shutdown/hung. Bare in mind that the more CPU consumption, the heat generated. Thus, more cool air needed for a datacenter.

We do not know, are there any environmentalist calculated the total CO2 produced by spam each year.   But if you or your friends love to sending chain-letter, please advice them to stop now.

We was always looking for a cheap and effective anti spam solutions that can be deployed in multi-layer anti-spam architecture. Thank to Open Source Movement, today, we have few OSS solution that on par with proprietary software company.

In this module we will be discussing a few well-known solution as the following

E-Mail Security Virtual Appliance (ESVA)

ESVA is a pre-built and  email scanning appliance that will run on VMware Workstation, Server, Player or ESX Server. The based OS is slim version of CentOS Linux. This is a highly flexible and easy to deploy solution. You can have you AntiSpam Box run in less than 10mins!

The creator of ESVA is Andrew MacLachlan, and the project is  now registered under sourceforge.net and forum is temporary maintained under ESVA community

For project  information, please visit http://esva-project.sourceforge.net/

For community support forum, please visit http://rbe1.de/ESVA/index.php

Part 1: ESVA installation

Part 2: ESVA filtering with for Multiple Domains

Part 3: Disable GreyListing in ESVA

Part 4: Remove "This message has been checked by ESVA and is believed to be clean" footer

Part 4: ESVA testing on Spam Filtering, Antivirus and Open Relay

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