[Dovecot] mailbox format w/ separate headers/data

[Timo Sirainen]

On 22.1.2010, at 23.14, Frank Cusack wrote:

>> This is more or less what dbox's single instance storage is going to do.
>> Maybe in half a year or so.. And you don't even need filesystem
>> deduplication feature. :)
> 
> But if the mail system has to handle it, it only knows about mails
> written at the same time.  For example, if postfix delivers mail
> with a single recipient per mail (the recommended config somewhere,
> not sure if recommended by postfix or by dovecot), dbox won't get
> the opportunity to dedup.

Well, doing the multiple-recipients-at-a-time already works with v1.1+ with Maildir.

> And for mails which are re-forwarded (pretty common occurrence), again
> dbox won't get the chance to dedup.
> 
> Or will there be a global index?

Yes. That's what dbox SIS is about. You have a global repository of (large) MIME parts, indexed by their SHA1 sum (or something).