My evolution (3.0.3) has a maildir directory:
~/.local/share/evolution/mail/local/
cur/##########.######_#.username:2,S
cur/#########.######_#.username:2,S
folders.db
new/
tmp/
folders.db
says something about sqlite
in it, I can't tell if there are mail messages in that file; the files under cur
seem to have messages in them; but they are not in mbox
format, and it doesn't look like all of the messages that I have under "On This Computer" are in these files.
There is no ~/.evolution/
directory.
How (and where if I'm not looking in the right place) does evolution store its email?