From the project Github page: "ePADD is a software package developed by Stanford University's Special Collections & University Archives that supports archival processes around the appraisal, ingest, processing, discovery, and delivery of email archives.
The software is comprised of four modules:
Appraisal: Allows donors, dealers, and curators to easily gather and review email archives prior to transferring those files to an archival repository.
Processing: Provides archivists with the means to arrange and describe email archives.
Discovery: Provides the tools for repositories to remotely share a redacted view of their email archives with users through a web server discovery environment. (Note that this module is downloaded separately).
Delivery: Enables archival repositories to provide moderated full-text access to unrestricted email archives within a reading room environment."
On migrating from different email formats before ingest to ePADD https://groups.google.com/forum/#!topic/digital-curation/srt-oIVwAGU