According to Symantec, in the month of June 2010 88% of all email was spam.
So in other words 88% of the traffic handled by your on-premise email server is unwanted. Why pay for the wasted bandwidth or manage hardware and software for something that is easily managed externally for a very reasonable cost?
The two major players in hosted spam management and email archival are Symantec MessageLabs and Google Postini.
Our recommendation is Google Postini. It protects over 18 million users, is straightforward to configure, can be automatically synchronized to your Microsoft Exchange/Active Directory (or LDAP), and costs less.
Interlockit.com we're happy to make the deployment process painless for you.