Ein Klassiker: Postfix Cyrus :-)

Feb  1 15:53:06 nbg master[9717]: about to exec /usr/lib/cyrus-imapd/lmtpd
Feb  1 15:53:06 nbg lmtpunix[9717]: DBERROR db4: Berkeley DB library configured to support only DB_PRIVATE environments
Feb  1 15:53:06 nbg lmtpunix[9717]: DBERROR: dbenv->open '/var/lib/imap/db' failed: Invalid argument
Feb  1 15:53:06 nbg lmtpunix[9717]: DBERROR: init() on berkeley
Feb  1 15:53:06 nbg lmtpunix[9717]: executed
Feb  1 15:53:06 nbg lmtpunix[9717]: DBERROR db4: environment not yet opened
Feb  1 15:53:06 nbg lmtpunix[9717]: DBERROR: opening /var/lib/imap/deliver.db: Invalid argument
Feb  1 15:53:06 nbg lmtpunix[9717]: DBERROR: opening /var/lib/imap/deliver.db: cyrusdb error
Feb  1 15:53:06 nbg lmtpunix[9717]: FATAL: lmtpd: unable to init duplicate delivery database

------ /etc/postfix/main.cfg
mailbox_transport = lmtp:unix:/var/lib/imap/socket/lmtp

------ /etc/imapd.conf
configdirectory: /var/lib/imap
partition-default: /var/spool/imap
admins: cyrus
sievedir: /var/lib/imap/sieve
sendmail: /usr/sbin/sendmail
hashimapspool: true
sasl_pwcheck_method: saslauthd
sasl_mech_list: PLAIN
createonlogin: yes
createonpost: yes
tls_cert_file: /usr/share/ssl/certs/cyrus-imapd.pem
tls_key_file: /usr/share/ssl/certs/cyrus-imapd.pem
tls_ca_file: /usr/share/ssl/certs/ca-bundle.crt


----- /etc/cyrus.conf
# standard standalone server implementation

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

  # this is only necessary if using idled for IMAP IDLE
#  idled                cmd="idled"
}

# UNIX sockets start with a slash and are put into /var/lib/imap/sockets
SERVICES {
  # add or remove based on preferences
  imap          cmd="imapd" listen="imap" prefork=5
  imaps         cmd="imapd -s" listen="imaps" prefork=1
  pop3          cmd="pop3d" listen="pop3" prefork=3
  pop3s         cmd="pop3d -s" listen="pop3s" prefork=1
  sieve         cmd="timsieved" listen="sieve" prefork=0

  # these are only necessary if receiving/exporting usenet via NNTP
#  nntp         cmd="nntpd" listen="nntp" prefork=3
#  nntps                cmd="nntpd -s" listen="nntps" prefork=1

  # at least one LMTP is required for delivery
#  lmtp         cmd="lmtpd" listen="lmtp" prefork=0
#  lmtpunix     cmd="lmtpd" listen="/var/lib/imap/socket/lmtp" prefork=1
  lmtpunix      cmd="lmtpd" listen="/var/lib/imap/socket/lmtp" prefork=0

  # this is only necessary if using notifications
#  notify       cmd="notifyd" listen="/var/lib/imap/socket/notify" proto="udp" prefork=1
}

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

  # this is only necessary if using duplicate delivery suppression,
  # Sieve or NNTP
  delprune      cmd="cyr_expire -E 3" at=0400

  # this is only necessary if caching TLS sessions
  tlsprune      cmd="tls_prune" at=0400
}