[Dovecot] clarifications on shared mailboxes

[Frank Bonnet]

Hello

I need some clarifications on shared mailboxes.
Actually we use MBOX format with "real" unix users , but I've been asked
to create some shared mailboxes for some users who need to have some
for their working groups.

What would be the best way to create those shared mailboxes ?

Would it be possible to create some "shared space" on the server
in maildir format to get advantage of the last seen flag ?

If yes some config examples would be a great help.

See attach the doveconf -n output ( certificates names have been 
obscured ;-) )


Thank you.


# 2.0.14: /usr/local/etc/dovecot/dovecot.conf
# OS: FreeBSD 7.4-RELEASE amd64  
auth_verbose_passwords = plain
auth_worker_max_count = 100
debug_log_path = /var/log/dovecot/debug.log
default_client_limit = 6144
default_process_limit = 1024
disable_plaintext_auth = no
info_log_path = /var/log/dovecot/info.log
log_path = /var/log/dovecot/dovecot.log
mail_location = 
mbox:%h/:INDEX=/raid/cache/dovecot/index/%u:INBOX=/raid/var/mail/%u:CONTROL=%h/
mail_temp_dir = /var/tmp
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope encoded-character 
vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy 
include variables body enotify environment mailbox date
mbox_lock_timeout = 3 mins
mbox_write_locks = fcntl
mmap_disable = yes
passdb {
  args = /usr/local/etc/dovecot/dovecot-ldap.conf.ext
  driver = ldap
}
plugin {
  acl = vfile
  sieve = ~/.dovecot.sieve
  sieve_dir = ~/sieve
}
postmaster_address = postmas...@esiee.fr
protocols = imap pop3
sendmail_path = /usr/local/sbin/sendmail
service auth {
  client_limit = 7169
}
service imap-login {
  inet_listener imap {
    port = 143
  }
  inet_listener imaps {
    port = 993
    ssl = yes
  }
  process_min_avail = 10
  service_count = 1
  vsz_limit = 1 G
}
service imap {
  process_limit = 2048
  vsz_limit = 1 G
}
service managesieve-login {
  inet_listener sieve {
    port = 4190
  }
  inet_listener sieve_deprecated {
    port = 2000
  }
}
service pop3-login {
  inet_listener pop3 {
    port = 110
  }
  inet_listener pop3s {
    port = 995
    ssl = yes
  }
}
ssl_ca = <xxx.pem
ssl_cert = <xxx.pem
ssl_key = <xxx.pem
userdb {
  args = /usr/local/etc/dovecot/dovecot-ldap.conf.ext
  driver = ldap
}
verbose_proctitle = yes
protocol lda {
  info_log_path = /var/log/dovecot/dovecot-lda.log
  log_path = /var/log/dovecot/dovecot-lda-errors.log
  mail_plugins = sieve $mail_plugins
}
protocol imap {
  imap_client_workarounds = tb-extra-mailbox-sep
  mail_max_userip_connections = 30
}
protocol sieve {
  mail_max_userip_connections = 30
  managesieve_implementation_string = Dovecot Pigeonhole
}