I have the following for 1.2. You may search the list archive, I asked that question about halv a year ago and Timo answererd it for both 1.2 and 2.0.
auth default {
[...]
# Master-Benutzer für Sieve.
# Wirkt nur für Sieve, weil es master.imap und master.pop nicht gibt.
passdb passwd-file {
master = yes
args = DOVECOT_CONFDIR/master.%s
# kein pass = yes, weil das bei LDAP-Authentication-Binds nicht geht.
}
[...]
}
And a master.sieve file containing
sievemaster:{SHA}......
