This is something we have been trying to do in our company -with no simple solution.We have over 40 employees consulting on many (Hundreds) projects. Everyone has their own mail database which is maintained on the domino server.
Here is what we would like to do.
1) Any user can create a new mail database, make it shared, move it into a project folder (outside domino server) on a network drive.
2) As people receive messages related to a common project - they drag and drop (or forward) the message from their mailbox to the project folder mailbox.
Can do the first item - can't seem to figure out how to do the second option.