http://forums.method.me/cs/blogs/releasenotes/archive/2014/03/10/sync-engine-updates-v1-v2.aspxEmail Service Updates The following updates are available as of March 10th. Email Performance improvement - Multi-threading has been enabled, facilitating faster email broadcasts. Email Error Handling - Improved error recovery has been implemented, resultingenCommunityServer 2007.1 SP2 (Build: 31113.47)