Sieve script for a shared mailbox

[Etienne ETOURNAY]

Create a sieve script for a user mailbox is simple.
But I want to create a sieve script for a shared mailbox (seen by a users group).

A user foo has a mailbox /var/spool/cyrus/f/user/foo/ and sieve /var/spool/sieve/f/foo/ .
But a shared mailbox "info at example.com" has a /var/spool/cyrus/i/info but no sieve.

How to create a sieve script for a shared mailbox ?

The link http://www.cyrusoft.com/sieve/ is dead.

Version: Cyrus 2.1.18 Debian 3.1 Sarge with Postfix.

Thanks
-- 
Etienne ETOURNAY
ALIXEN
tel: 01 69 85 24 13
fax: 01 69 85 24 10