Postini
Postini is an email protection service that provides each user with a Message Center where your spam and viruses are filtered and quarantined. Your legitimate email messages are delivered to your email inbox, just as they always have, but junk and virus-infected email is routed to your Message Center.
FEATURES Google Message Security - Protect email from spam, viruses, phishing, denial of service, directory harvest attacks.
SLA - 99.999% availability for message processing and 100% virus protection. Google filters and delivers billions of transactions daily.
Works with Existing Email Systems - No need to add hardware or software. Updates arrive automatically, no downtime or additional costs.