[Dovecot] Adding new storage backend to Dovecot

[Earl Dreller]

I'm exploring adding a new storage backend to dovecot, storing mail in some
sort of database, and had a few questions. Hoping someone here might be able
to help :)

-Is all of the 'storage' specific code in housed in lib-storage/index? Would
adding a new storage backend be as simple as recreating all of the public
functions of the current /mbox or /maildir code such as they pertain to that
storage mechanism?

-Where is the particular storage method controlled? I've had a look around
but can't seem to find where the decision to use the 'mbox' or 'maildir'
code is.

-Finally, if there isn't a filesystem associated with the mail storage area,
obviously the index data code will need to change somewhere. Any ideas on
the complexities of that?

Thanks!