email archive and compliance is becoming an issue in the offices I support. I'm looking for an appliance that easily filters and archives emails so I can keep my client's eschange 2003 and 2007 datastores as small as possible, while remaining searchable. i found http://www.vmware.com/appliances/directory/node/205843 MPP and I'm looking for a couple other options to compare it to. archiving is primary purpose, spam control is secondary.
Thanks in advance for all constructive ideas and information
Dylan