root@dovecot:/# dovecot -n
# 2.2.23 (806d709): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.4.13 (7b14904)
# OS: Linux 4.4.0-15-generic x86_64 Debian 8.4 ceph
auth_mechanisms = plain login
default_vsz_limit = 512 M
disable_plaintext_auth = no
doveadm_password =  # hidden, use -P to show it
imap_max_line_length = 2 M
import_environment = DOVECOT_CLUSTER
log_path = /dev/stderr
mail_attachment_dir = /srv/dovecot/attach/%d
mail_attachment_hash = %{sha512}
mail_attachment_min_size = 64 k
mail_fsync = always
mail_gid = nogroup
mail_location = sdbox:/srv/dovecot/mail/%d/%n
mail_max_userip_connections = 500
mail_nfs_index = yes
mail_nfs_storage = yes
mail_plugins = quota zlib
mail_uid = nobody
mmap_disable = yes
namespace {
  inbox = yes
  location =
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox Spam {
    special_use = \Junk
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix = INBOX.
  separator = .
}
passdb {
  args = /etc/dovecot/dovecot-sql.conf.ext
  driver = sql
}
plugin {
  quota = dict:Quota::file:/srv/dovecot/mail/%d/%n/dovecot-quota
  sieve = /srv/dovecot/mail/%d/%n/.dovecot.sieve
  sieve_before = /etc/dovecot/sieve/makedToSpamFolder.sieve
  sieve_dir = /srv/dovecot/mail/%d/%n/sieve
  zlib_save = bz2
  zlib_save_level = 6
}
protocols = imap pop3 lmtp
service doveadm {
  inet_listener {
    port = 12345
  }
}
service imap-login {
  inet_listener imap {
    port = 143
  }
  inet_listener imaps {
    port = 993
  }
  service_count = 1000
}
service lmtp {
  inet_listener lmtp {
    port = 7025
  }
}
service pop3-login {
  inet_listener pop3 {
    port = 110
  }
  inet_listener pop3s {
    port = 995
  }
  service_count = 1000
}
ssl = no
userdb {
  args = /etc/dovecot/dovecot-sql.conf.ext
  driver = sql
}
protocol lmtp {
  mail_plugins = quota zlib sieve
  postmaster_address = postmaster@m9.network
}
protocol imap {
  mail_max_userip_connections = 500
  mail_plugins = quota zlib imap_quota
}
protocol pop3 {
  mail_max_userip_connections = 500
  pop3_uidl_format = %v-%u
}