root@server1:~# doveconf -n
# 2.3.7.2 (3c910f64b): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.7.2 (7372921a)
# OS: Linux 4.15.0-65-generic x86_64 Ubuntu 18.04.3 LTS
# Hostname: server1
auth_cache_negative_ttl = 0
auth_cache_size = 10 M
auth_master_user_separator = *
auth_worker_max_count = 1024
base_dir = /var/run/dovecot/
default_client_limit = 10000
default_vsz_limit = 1 G
doveadm_password = # hidden, use -P to show it
doveadm_port = 12345
first_valid_gid = 10000
first_valid_uid = 10000
imap_max_line_length = 640 k
last_valid_gid = 10000
last_valid_uid = 10000
mail_gid = 10000
mail_location = mdbox:%h/mdbox
mail_plugins = " mail_log notify zlib notify replication"
mail_privileged_group = mail
mail_uid = 10000
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 index ihave duplicate mime foreverypart extracttext
namespace inbox {
  hidden = no
  inbox = yes
  list = yes
  location =
  prefix =
  separator = /
  subscriptions = yes
  type = private
}
passdb {
  args = /etc/dovecot.deny
  deny = yes
  driver = passwd-file
}
passdb {
  args = /etc/dovecot/private/passwd.masterusers
  driver = passwd-file
  master = yes
}
passdb {
  args = /etc/dovecot/dovecot-ldap-passdb.conf.ext
  driver = ldap
}
plugin {
  mail_replica = tcp:server2
  sieve = file:~/sieve;active=~/.dovecot.sieve
  sieve_default = /var/lib/dovecot/default.sieve
  sieve_max_actions = 55
  sieve_max_redirects = 50
}
pop3_uidl_format = %08Xv%08Xu
protocols = imap pop3 lmtp sieve
replication_dsync_parameters = -d -n INBOX -l 30 -U
replication_max_conns = 20
service aggregator {
  fifo_listener replication-notify-fifo {
    user = vmail
  }
  unix_listener replication-notify {
    user = vmail
  }
}
service auth-worker {
  user = $default_internal_user
}
service auth {
  client_limit = 10000
}
service config {
  process_min_avail = 8
}
service doveadm {
  inet_listener {
    port = 12345
  }
  vsz_limit = 1 G
}
service imap-login {
  process_min_avail = 64
  service_count = 0
}
service imap {
  process_limit = 8192
}
service lmtp {
  inet_listener lmtp {
    port = 24
  }
}
service managesieve-login {
  inet_listener sieve {
    port = 4190
  }
  process_min_avail = 8
  service_count = 0
}
service pop3-login {
  process_min_avail = 8
  service_count = 0
}
service replicator {
  process_min_avail = 1
  unix_listener replicator-doveadm {
    mode = 0600
    user = vmail
  }
}
service submission-login {
  service_count = 0
}
ssl = required
ssl_ca = </etc/ssl/certs/chain.pem
ssl_cert = </etc/ssl/certs/cert.pem
ssl_client_ca_dir = /etc/ssl/certs
ssl_dh = # hidden, use -P to show it
ssl_key = # hidden, use -P to show it
ssl_require_crl = no
userdb {
  args = /etc/dovecot/dovecot-ldap-userdb.conf.ext
  driver = ldap
  name = userdb_ldap
}
protocol imap {
  mail_max_userip_connections = 25
  mail_plugins = " mail_log notify zlib notify replication imap_zlib"
}
protocol lmtp {
  mail_plugins = " mail_log notify zlib notify replication sieve"
}