Metadata that could be extracted from emails:
- email addresses sent to
- addresses cc’d on messages
- message thread length
- message length
- thread response time
- response time of day
- receive time of day
- when it was read
- unread time
- content analysis
- content/participant correlation
There is more that could be gotten with address books (address books should also pool w/ feed aggregators, IM conversations
On the other end, email2kb tools are a good idea, especially for capturing project documentation and tracking ticket/task status.
See also: