Review of Open Source Anti-Spam Software - ESVA Email Security Virtual Appliance (ESVA)

Are you trying for a 'Free (price free) and Straightforward' antispam  or spam blocker solution for your organization that support multiple email domains?
Are your looking for a anti-spam resolution can be deployed in your production surroundings for less than twenty min?
ESVA Email Security Virtual Appliance (ESVA) may be a FOSS-primarily based anti-spam resolution  created by Andrew MacLachlan since year 2005. ESVA could be a pre-engineered Virtual Appliance that runs on virtual machines. The most recent version of ESVA can run on VMWare, run on Citrix XenServer, Microsoft Hyper-V and VMware platforms.
The development of the applying has been stop for almost a pair of long years to the day once the release of version 2058. I used to be thus happy that current version 2060 isn't available. To download the newest version please visit ESVA's GD official website.
The main components of ESVA are:
?    CentOS - Strong Red Hat-cloned Operating System
?    MailScanner - Anti-spam package for e-mail gateway systems.
?    MailWatch- Web-primarily based  admin page for MailScanner
?    Postfix -  Email System
?    SQLgrey - Greylisitng Filtering
?    Webmin - Net-based  admin page CentOS and Postfix admin
?    ClamAV - Open Supply antivirus
?    Distributed Checksum Clearinghouses (DCC)  & Vipul's Razor - Bulk Spam Mail detection
?    Pyzor - Spam detecting network
?    SpamAssassin  - Well-known spam filtering package for header,  text analysis, Bayesian filtering, DNS blocklists and filtering database
?    FuzzyOCR - Content and properties of pictures Filtering based on fuzzy logic
?    MailGraph - Graphical Mail statistics tools
Why I exploit ESVA?
The advantage of using ESVA are:
1.    Free in cost,
2.    robust system,
3.    filtering accuracy
4.    domain and sender black-listing
5.    domain and sender white-listing
6.    quarantine and unharness report (per user basis or per domain)
7.    easy to use and customized.
I've deployed self-customized version of ESVA in our datacentre since 2007 and it is still one among our best anti-spam solutions. Although, Bayesian filtering technique require time to designed on SPAM or HAM database. Overtime, ESVA's on mail filtering becomes more effective to differentiate between the ham and also the spam compare to some industrial products.
We have two units of ESVA deployed at layer2 running our datacentre to require care of additional than five hundred domains and ten,000 volume of email per hour. Our ESVA is employed for e-mail quarantine, anti-virus scanning, fuzzy OCR and Bayesian filtering.
However, some important options that I assume the author ought to include:-
1.     No SMTP Authentication or LDAP integration
2.    No Subject Filtering
3.    No Keyword Filtering
4.    Incorrect GIF and JPEG filtering
A number of the above-mentioned weakness can be solved by scripts customization. But, I would like to figure out the feature of every package and plug-in and file path. Current, I'm compiling FAQ and customization configuration and hope that anyone using of ESVA will be profit from it.
Nevertheless, ESVA is one in every of the most effective and powerful FOSS-based mostly spam solution I ever deployed. It undoubtedly can facilitate your organization on spam issues.

Additional articles about White Gold Diamond Cluster Earring

About the author

Please Rate This Article

Select Rating Excellent Very Good Interesting Fair Could Use Improvement

Number of ratings: 0
Rating: 0