Riparian @ Github
If you're interested the the gritty bits of Skimbox and/or Timberwolf, please poke around our Github repos.
Timberwolf is an open-source, command-line program for importing emails from Microsoft Exchange into Apache HBase. It will locate all emails within an Exchange instance which it has access to and import them into HBase. By keeping track of when it was last run, Timberwolf can incrementally update HBase with new messages.