I have a lot of eml files, archived from an account, and stored in a bunch of folders, one per month. It's not a standard maildir structure, and the files don't have special names, they're just like:
2015-01/
foo.eml
bar.eml
...
2015-02/
baz.eml
qux.eml
...
etc
I would like to make them accessible, read-only, over IMAP, preferably using dovecot, without changing the structure/naming if possible. It would be great if all the emails can appear together in the inbox, but separate folders by month (as they are structured on disk) are ok too.