Spam filtering at the mail server
ZDNet reports a free anti-spam service for small business.
http://news.zdnet.com/2110-1009_22-5432614.html
This is good only for small companies using one domain with which to receive email. The cap is 5,000 emails per month.
This sounds a little too much like a free trial to me, but I like the model. It should get Netriplex recognized in the market more quickly with the "free" term being slung around.
I think I'd wait a bit before trusting one of my key email domains to them just to save a few dollars.
Other antivirus and anti-spam technologies for email strike my fancy more. MDeamon is a cost-effective solution providing ease of administration and reliability. Spam filtering is included with the server, and their proprietary anti-virus has kept my machine virus free for nearly a year of hosting I've had with a server that runs it.
This is what GKG uses.