cyrus and sieve: how to setup?

[Erik Steffl <steffl@bigfoot.com>]

  I have cyrus imap server working and I would like to use sieve to
filter email. I have several questions that I hope somebody will answer:

  1) the only implementation of sieve in debian that I found is
undocumented progam called sieve in mailutils - is that the one to use?
if not, which one should I use?

  2) how do I setup sieve to filter email? I see no hooks in cyrus and
have no idea who would invoke sieve. I have found nothing in cyrus docs
(does not mention sieve at all). I even have IMAP book (Managing IMAP by
Dianna & Kevin Mullet, O'Reilly) and it is VERY vague about who and how
invokes sieve and how it works with imap server).

  3) why is debian package so old? there are new versions of cyrus
available (even new major version - debian package is still at 1.5 even
though the upstream is at 2). there are also old unresolved bugs on
cyrus - anybody knows what's going on? Is there a problem with new
cyrus? is it being packaged? (sieve is included in newer versions so I
guess it would help me to solve the above)

  TIA!

	erik