should I use ORF vamsoft or Symantec Mail Security for Microsoft Exchange for my exchange 2003 server?

for vamsoft ORF if I purchase it , it will update the virus diffinition for life time?

I want antivius solution for my exchange 2003 so if I use symantec I have to renew it every year?and per email box?

After searching for the right link on their site, I could not find it easily on my iPhone, so here it is in case you need it:

http://www.vamsoft.com/clamav-guide-part1.asp

Symantec is a per mailbox, per year product.

How many users do you have?

90 users and expanding

Vamsoft will be much cheaper long term (and is a seriously better product IMHO).

ClamAV is also free.

I need and antivirus solution for exchange 2003 not antispam?

If you only need an Anti-Virus solution for Exchange 2003, then Vamsoft ORF is not a product that you can use as it is an Anti-Spam product.
There are plenty of others available:
Symantec Endpoint Protection
Kaspersky
McAfee
ESET Nod 32
XWall
Avast
Trend
Sophos
etc
Here is a link for a handful of them:
http://www.msexchange.org/software/Email-Anti-Virus/ 

I have nod 32 business edition 4 , is it the same edition as for exchange 2003 , or different?

It would appear to be the same:
http://www.eset.eu/products/nod32-for-windows-be-4-system-requirements 

currently there is  trend micro installled , but it is out of license, so you advise me to remove it and install eset nod32 business edition 4 , also I found in the website of nod that there is also nod32 for exchange

ESET Mail Security 4
For Microsoft Exchange Server
http://www.eset.eu/products/eset-mail-security-for-microsoft-exchange-server

I am not advising you to opt for one AntiVirus package over another.

First you ask if you should use Vamsoft ORF or Symantec Mail Security, then you say you have ESET Nod 32 Business Edition 4 and now you say you have Trend Micro.

To say I am confused would be an understatement.

What have you got currently and what are you wanting to do?

Are you after Anti-Virus with Anti-Spam, just Anti-Virus or just Anti-Spam?

Sir  sorry for this,
I am not asking for antispam,I am asking for antivirus,
I was having trend server and the client installed on exchange, because the license expired on server for trend , I format the server and use it for file sharing server, I manage to get eset nod32 Business Edition 4, and I began to install it on the servers, before removing trend I was asking for help , to use best practice, Because right now trend on exchange 2003 is Disconnected and I dont know if it is working 100% or will make problem in the future, so you advise me to remove th trend and install this edition eset nod32 4 Business edition

10x