Cyrus és Shared folders

Küzdök egy ideje, de nem jön össze :(
Help please!

Hogyan kell beállítanom a Cyrus és/vagy Exim4 -et, hogy menjenek a levelek a Shared folderbe?

mosaic:/etc# cat cyrus.conf

START {
# do not delete this entry!
recover cmd="/usr/sbin/ctl_cyrusdb -r"

# this is recommended if using duplicate delivery suppression
delprune cmd="/usr/sbin/cyr_expire -E 3"
# this is recommended if caching TLS sessions
tlsprune cmd="/usr/sbin/tls_prune"
}

SERVICES {
# --- Normal cyrus spool, or Murder backends ---
# add or remove based on preferences
imap cmd="imapd -U 30" listen="imap" prefork=0 maxchild=100

lmtp cmd="lmtpd" listen="lmtp" prefork=0 maxchild=20
lmtpunix cmd="lmtpd" listen="/var/run/cyrus/socket/lmtp" prefork=0 maxchild=20
# ----------------------------------------------

# useful if you need to give users remote access to sieve
# by default, we limit this to localhost in Debian
# sieve cmd="timsieved" listen="localhost:sieve" prefork=0 maxchild=100

# this one is needed for the notification services
notify cmd="notifyd" listen="/var/run/cyrus/socket/notify" proto="udp" prefork=1

# --- Murder frontends -------------------------
# enable these and disable the matching services above,
# except for sieve (which deals automatically with Murder)

# mupdate database service - must prefork at least 1
# (mupdate slaves)
#mupdate cmd="mupdate" listen=3905 prefork=1
# (mupdate master, only one in the entire cluster)
#mupdate cmd="mupdate -m" listen=3905 prefork=1

# proxies that will connect to the backends
#imap cmd="proxyd" listen="imap" prefork=0 maxchild=100
#imaps cmd="proxyd -s" listen="imaps" prefork=0 maxchild=100
#pop3 cmd="pop3proxyd" listen="pop3" prefork=0 maxchild=50
#pop3s cmd="pop3proxyd -s" listen="pop3s" prefork=0 maxchild=50
#lmtp cmd="lmtpproxyd" listen="lmtp" prefork=1 maxchild=20
# ----------------------------------------------
}

EVENTS {
# this is required
checkpoint cmd="/usr/sbin/ctl_cyrusdb -c" period=30

# this is only necessary if using duplicate delivery suppression
delprune cmd="/usr/sbin/cyr_expire -E 3" at=0401

# this is only necessary if caching TLS sessions
tlsprune cmd="/usr/sbin/tls_prune" at=0401

# indexing of mailboxs for server side fulltext searches

# reindex changed mailboxes (fulltext) approximately every other hour
#squatter_1 cmd="/usr/bin/nice -n 19 /usr/sbin/squatter -s" period=120

# reindex all mailboxes (fulltext) daily
#squatter_a cmd="/usr/sbin/squatter" at=0517
}

mosaic:/etc# cat imapd.conf
allowplaintext: yes
hashimapspool: 1
sharedprefix: shared
postuser: bb
sasl_mech_list: PLAIN
imap_admins: cyrus
admins: cyrus
sasl_pwcheck_method: saslauthd
sievedir: /var/spool/sieve
configdirectory: /var/lib/cyrus
altnamespace: 1
autocreatequota_units: 1
sieve_admins: cyrus
sasl_auto_transition: no
lmtp_downcase_rcpt: yes
partition-default: /system/mail/cyrus/mail
userprefix: user
sieveusehomedir: false
umask: 077
lmtp_admins: postmaster

De most komolyan nem értem. Ki tud segíteni?

Ha a postuser = bb. Akkor bb-nek semmilyen levél sem megy el. Ha nem állítom be a postuser -t akkor kap levelet a bb, de akkor meg nem tudom a Shared folderbe küldeni.

Valaki segítsen! Napok óta szenvedek vele, de nem jó! :(

:(
Csináljam inkább Postfix-el? Úgy látom az Exim-et egyre kevesebben használják.