Antivirus on a Smart Host

We are setting up a new 2003 exchange environment and are going to be useing a model that includes a smart host to do all our email handeling from the internet.  I am wondering what everyone's advise is on antivirus and spam filtering for that box.  Our thought was to put symantec corporate on that box with some type of spyware filter and have that run all the time.  Then just install the exchage option on the exchange servers as a added percaution.  Does this sound about right or would there be a better way to do this?  Thanks for the advise!
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Symantec Corporate edition is a file-level AV program; if you attempt to use it to scan Exchange 2003 files, it will corrupt your database.  You need to purchase SMTP/Exchange 2003 AV software.  I recommend Sybari Antigen, but Symantec also makes a product called Mail Security for Exchange 2003 and Mail Security for SMTP (for your SmartHost).

These will cost more than Symantec CE (per mailbox), but are well worth it.

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hamel01Author Commented:
I'm sorry i should of been more clear.  We have the Mail Security for Exchange 2003 and the Mail Security for SMTP.  I never knew what the SMTP part was for but know i am getting an idea.  Thanks!  Are there any other suggestions.

Also, there is a difference between spyware and SPAM.  Spyware tools will need to run on users' desktops.  I suggest CA's PestPatrol from an enterprise standpoint, but other options exist including inline appliances monitoring web traffice.  SPAM filtering can be done with both the Antigen and Symantec products.  A decent price for performance Antispam appliace is the Baracuda Networks appliances:
actually there is two typ of scanning can be configured one is called SMTP and other one which works when messages moves to exchange, the smtp monitors smtp communications i mean when u send or receive emails to other servers and the other one works when emails moving in or out the exchange mailboxes.

the best is that u configure both type of scanning if u can so u have control on outerworld communication as well as interoffice communications.
we are currently using GFI mail security for smtp and trenmicro for exchange api.
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