[Dovecot] Hooks on folder operations

[Timo Sirainen]

On Wed, 2003-07-23 at 17:50, Maikel Verheijen wrote:
> > I'm interested in implementing an anti-spam system using 
> > bayesian filtering. I had the idea of modifying and IMAP 
> > server to assist in training the spam filter.
> Why do you want to hook it up into your imap server? I think it would
> be better to prevent emails to enter the mailbox with the MTA rather
> than removing it when the user is reading his email using imap.
> 
> Why? Because the spam that is in the mailbox might push the user over
> his quota limit, and thus preventing legitimate emails to be
> delivered.

Well, I'd actually want that too. I don't have quota problems and I make
spamassassin put all spam into spam mailbox. The few spams that go
through to inbox I usually just delete because I'm too lazy to make
spamassassin's bayesian filter to learn it. If I only had to move them
to spam mailbox, I'd probably do it :)

> With the new API code that Timo is making now, I guess this would be
> possible.

Yep.

> You can always build a plugin, and plugins can be loaded whenever an
> administrator wants them to load. I don't know if Timo wants to
> include all plugins that are / will be written for dovecot, but I
> guess there might be a plugins part, where people can "post" their
> plugins so other people can benefit from them :)

I'll probably just add a plugins web page. Some of the most useful ones
I'll include in the tarball. Also I'll make it possible to compile the
plugins into the main binary so there's no overhead in dynamically
loading them.

At least quota and ACLs are going to be plugins. I'll make sure my APIs
are flexible enough to allow that.