Google has unveiled a service that lets businesses use Gmail as a back-up for Microsoft Exchange.
Known as Google Message Continuity, the service replicates all your Microsoft Exchange data on Google’s servers. If your Exchange servers crash or you take them down for maintenance, your employees can open up a browser and switch to Gmail, Google Calendar, and Google Contacts. The service is based on technology from Postini, the business email outfit Google purchase in 2007…
