VeriSign Announced Email Security Service
Filed in: Web — June 29th, 2004
The service uses custom blacklists, fingerprinting and heuristic tools, which calculate the probability that a particular e-mail message is spam by examining a pattern of characteristics in the message. VeriSign’s heuristic tools use more than 10,000 rules to determine whether a message is spam, the company said.
For blocking malicious mail, the service deploys three antivirus engines. For policy enforcement, customers can use domain-level filtering to scan inbound and outbound e-mail. And a disaster recovery feature allows for automatic switchover to VeriSign’s network to provide SMTP connections that queue e-mail, if a company’s e-mail server is not available.
How it works?
[ Read more @ VeriSign, via News.com ]
Thought:
Personally, my webhost is already has virus scanner and spam mail filter for all incoming emails. 
I think most webhosting provider are able to provide the same service at lower cost, no?
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