CentOS Linux Server Guide

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/

 

 

Update:3 June 2011

Thanks for Federico Bessone's information the NEW ESVA Community has been setup! 

For more information and community support forum, please visit

 http://www.esvacommunity.com/

 

For your information, our company's ESVA has been running happily for  almost 3 years and it still handling email  traffic approx 30,000 per day.


 

update: 6 September 2009:

The domain is back online again. For more information,

http://www.global-domination.org

 

 

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 5: ESVA testing on Spam Filtering, Antivirus and Open Relay

Part 6: Solving the email cannot release from quarantine issue

 

Tips:

 

 

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