Service Pack 3 (SP3) for Microsoft Exchange 2007 was released in June 2010. What versions of SMSMSE support Exchange 2007 SP3?
Certification for Windows Exchange Server 2007 SP3 (English) was introduced in Symantec Mail Security for Microsoft Exchange 6.5.1. Customers are encouraged to upgrade to the latest available release.
SMSMSE 6.0.x is not yet certified for Exchange 2007 SP3. Customers are encouraged to upgrade to the latest release of SMSMSE.
To conform to best practice, customers are always encouraged to perform a trial rollout to evaluate the combination before deploying Microsoft's latest Service Pack throughout their organization's mail servers.