What imap ssl/auth settings work best with MS Outlook?

Steve Dondley s at dondley.com
Thu Apr 29 16:40:44 EEST 2021


> I am using Outlook without any problems what so ever.
> 
> It sounds to me like you are setting up Outlook to use port 465. In the
> setup screen, set the port to either "25" or "587". I am using "587"
> with "starttls" Your "incoming mail port" will depend on how you have
> Dovecot configured. I use port "143" with "starttls" for Outlook. YMMV
> depending on your configuration.
> 
> You might want to consider posting the output of "doveconf -a" and how
> you have Outlook configured.

To get things working with the client I had to set 
"disable_plaintext_auth = no" and have them use port 143. Obviously, 
this is not ideal. I could not get 993 working at all with the client's 
version of outlook. However, on MS 365, outlook works just fine.

It's insane.

# 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.4 ()
# OS: Linux 4.19.0-16-cloud-amd64 x86_64 Debian 10.9
# NOTE: Send doveconf -n output instead when asking for help.
auth_anonymous_username = anonymous
auth_cache_negative_ttl = 1 hours
auth_cache_size = 0
auth_cache_ttl = 1 hours
auth_cache_verify_password_with_worker = no
auth_debug = no
auth_debug_passwords = no
auth_default_realm =
auth_failure_delay = 2 secs
auth_gssapi_hostname =
auth_krb5_keytab =
auth_master_user_separator =
auth_mechanisms = plain login
auth_policy_check_after_auth = yes
auth_policy_check_before_auth = yes
auth_policy_hash_mech = sha256
auth_policy_hash_nonce =
auth_policy_hash_truncate = 12
auth_policy_reject_on_fail = no
auth_policy_report_after_auth = yes
auth_policy_request_attributes = login=%{requested_username} 
pwhash=%{hashed_password} remote=%{rip} device_id=%{client_id} 
protocol=%s
auth_policy_server_api_header =
auth_policy_server_timeout_msecs = 2000
auth_policy_server_url =
auth_proxy_self =
auth_realms =
auth_socket_path = auth-userdb
auth_ssl_require_client_cert = no
auth_ssl_username_from_cert = no
auth_stats = no
auth_use_winbind = no
auth_username_chars = 
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@
auth_username_format = %Ln
auth_username_translation =
auth_verbose = no
auth_verbose_passwords = no
auth_winbind_helper_path = /usr/bin/ntlm_auth
auth_worker_max_count = 30
base_dir = /var/run/dovecot
config_cache_size = 1 M
debug_log_path =
default_client_limit = 1000
default_idle_kill = 1 mins
default_internal_group = dovecot
default_internal_user = dovecot
default_login_user = dovenull
default_process_limit = 100
default_vsz_limit = 256 M
deliver_log_format = msgid=%m: %$
dict_db_config =
director_flush_socket =
director_mail_servers =
director_max_parallel_kicks = 100
director_max_parallel_moves = 100
director_output_buffer_size = 10 M
director_ping_idle_timeout = 30 secs
director_ping_max_timeout = 1 mins
director_servers =
director_user_expire = 15 mins
director_user_kick_delay = 2 secs
director_username_hash = %u
disable_plaintext_auth = no
dotlock_use_excl = yes
doveadm_allowed_commands =
doveadm_api_key =
doveadm_http_rawlog_dir =
doveadm_password =
doveadm_port = 0
doveadm_socket_path = doveadm-server
doveadm_username = doveadm
doveadm_worker_count = 0
dsync_alt_char = _
dsync_commit_msgs_interval = 100
dsync_features =
dsync_hashed_headers = Date Message-ID
dsync_remote_cmd = ssh -l%{login} %{host} doveadm dsync-server -u%u -U
first_valid_gid = 1
first_valid_uid = 500
haproxy_timeout = 3 secs
haproxy_trusted_networks =
hostname =
imap_capability =
imap_client_workarounds =
imap_fetch_failure = disconnect-immediately
imap_hibernate_timeout = 0
imap_id_log =
imap_id_retain = no
imap_id_send = name *
imap_idle_notify_interval = 2 mins
imap_literal_minus = no
imap_logout_format = in=%i out=%o deleted=%{deleted} 
expunged=%{expunged} trashed=%{trashed} hdr_count=%{fetch_hdr_count} 
hdr_bytes=%{fetch_hdr_bytes} body_count=%{fetch_body_count} 
body_bytes=%{fetch_body_bytes}
imap_max_line_length = 64 k
imap_metadata = no
imap_urlauth_host =
imap_urlauth_logout_format = in=%i out=%o
imap_urlauth_port = 143
imapc_cmd_timeout = 5 mins
imapc_connection_retry_count = 1
imapc_connection_retry_interval = 1 secs
imapc_features =
imapc_host =
imapc_list_prefix =
imapc_master_user =
imapc_max_idle_time = 29 mins
imapc_max_line_length = 0
imapc_password =
imapc_port = 143
imapc_rawlog_dir =
imapc_sasl_mechanisms =
imapc_ssl = no
imapc_ssl_verify = yes
imapc_user =
import_environment = TZ CORE_OUTOFMEM CORE_ERROR LISTEN_PID LISTEN_FDS
info_log_path =
instance_name = dovecot
last_valid_gid = 0
last_valid_uid = 0
lda_mailbox_autocreate = no
lda_mailbox_autosubscribe = no
lda_original_recipient_header =
libexec_dir = /usr/lib/dovecot
listen = *, ::
lmtp_hdr_delivery_address = final
lmtp_proxy = no
lmtp_proxy_rawlog_dir =
lmtp_rawlog_dir =
lmtp_rcpt_check_quota = no
lmtp_save_to_detail_mailbox = no
lmtp_user_concurrency_limit = 0
lock_method = fcntl
log_core_filter =
log_debug =
log_path = syslog
log_timestamp = "%b %d %H:%M:%S "
login_access_sockets =
login_greeting = Dovecot (Debian) ready.
login_log_format = %$: %s
login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c 
session=<%{session}>
login_plugin_dir = /usr/lib/dovecot/modules/login
login_plugins =
login_proxy_max_disconnect_delay = 0
login_proxy_notify_path = proxy-notify
login_source_ips =
login_trusted_networks =
mail_access_groups =
mail_always_cache_fields =
mail_attachment_detection_options =
mail_attachment_dir =
mail_attachment_fs = sis posix
mail_attachment_hash = %{sha1}
mail_attachment_min_size = 128 k
mail_attribute_dict =
mail_cache_compress_continued_percentage = 200
mail_cache_compress_delete_percentage = 20
mail_cache_compress_header_continue_count = 4
mail_cache_compress_min_size = 32 k
mail_cache_fields = flags
mail_cache_min_mail_count = 0
mail_cache_record_max_size = 64 k
mail_cache_unaccessed_field_drop = 30 days
mail_chroot =
mail_debug = no
mail_fsync = optimized
mail_full_filesystem_access = no
mail_gid =
mail_home =
mail_index_log2_max_age = 2 days
mail_index_log_rotate_max_size = 1 M
mail_index_log_rotate_min_age = 5 mins
mail_index_log_rotate_min_size = 32 k
mail_index_rewrite_max_log_bytes = 128 k
mail_index_rewrite_min_log_bytes = 8 k
mail_location = maildir:~/Maildir
mail_log_prefix = "%s(%u)<%{pid}><%{session}>: "
mail_max_keyword_length = 50
mail_max_lock_timeout = 0
mail_max_userip_connections = 10
mail_never_cache_fields = imap.envelope
mail_nfs_index = no
mail_nfs_storage = no
mail_plugin_dir = /usr/lib/dovecot/modules
mail_plugins = " fts fts_solr"
mail_prefetch_count = 0
mail_privileged_group = mail
mail_save_crlf = no
mail_server_admin =
mail_server_comment =
mail_shared_explicit_inbox = no
mail_sort_max_read_count = 0
mail_temp_dir = /tmp
mail_temp_scan_interval = 1 weeks
mail_uid =
mail_vsize_bg_after_count = 0
mailbox_idle_check_interval = 30 secs
mailbox_list_index = yes
mailbox_list_index_include_inbox = no
mailbox_list_index_very_dirty_syncs = no
maildir_broken_filename_sizes = no
maildir_copy_with_hardlinks = yes
maildir_empty_new = no
maildir_stat_dirs = no
maildir_very_dirty_syncs = no
managesieve_client_workarounds =
managesieve_implementation_string = Dovecot (Debian) Pigeonhole
managesieve_logout_format = bytes=%i/%o
managesieve_max_compile_errors = 5
managesieve_max_line_length = 65536
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
master_user_separator =
mbox_dirty_syncs = yes
mbox_dotlock_change_timeout = 2 mins
mbox_lazy_writes = yes
mbox_lock_timeout = 5 mins
mbox_md5 = apop3d
mbox_min_index_size = 0
mbox_read_locks = fcntl
mbox_very_dirty_syncs = no
mbox_write_locks = fcntl dotlock
mdbox_preallocate_space = no
mdbox_rotate_interval = 0
mdbox_rotate_size = 10 M
mmap_disable = no
namespace inbox {
   disabled = no
   hidden = no
   ignore_on_failure = no
   inbox = yes
   list = yes
   location =
   mailbox Drafts {
     auto = no
     autoexpunge = 0
     autoexpunge_max_mails = 0
     comment =
     driver =
     special_use = \Drafts
   }
   mailbox Junk {
     auto = no
     autoexpunge = 0
     autoexpunge_max_mails = 0
     comment =
     driver =
     special_use = \Junk
   }
   mailbox Sent {
     auto = no
     autoexpunge = 0
     autoexpunge_max_mails = 0
     comment =
     driver =
     special_use = \Sent
   }
   mailbox "Sent Messages" {
     auto = no
     autoexpunge = 0
     autoexpunge_max_mails = 0
     comment =
     driver =
     special_use = \Sent
   }
   mailbox Trash {
     auto = no
     autoexpunge = 0
     autoexpunge_max_mails = 0
     comment =
     driver =
     special_use = \Trash
   }
   order = 0
   prefix =
   separator =
   subscriptions = yes
   type = private
}
old_stats_carbon_interval = 30 secs
old_stats_carbon_name =
old_stats_carbon_server =
old_stats_command_min_time = 1 mins
old_stats_domain_min_time = 12 hours
old_stats_ip_min_time = 12 hours
old_stats_memory_limit = 16 M
old_stats_session_min_time = 15 mins
old_stats_user_min_time = 1 hours
passdb {
   args = /etc/dovecot/aliases
   auth_verbose = default
   default_fields =
   deny = no
   driver = passwd-file
   master = no
   mechanisms =
   name =
   override_fields =
   pass = no
   result_failure = continue
   result_internalfail = continue
   result_success = return-ok
   skip = never
   username_filter =
}
passdb {
   args =
   auth_verbose = default
   default_fields =
   deny = no
   driver = pam
   master = no
   mechanisms =
   name =
   override_fields =
   pass = no
   result_failure = continue
   result_internalfail = continue
   result_success = return-ok
   skip = never
   username_filter =
}
plugin {
   fts = solr
   fts_autoindex = yes
   fts_decoder = decode2text
   fts_solr = url=http://172.30.0.94:8983/solr/dovecot/
   recipient_delimiter = +
   sieve = file:~/sieve;active=~/.dovecot.sieve
   sieve_default = /var/lib/dovecot/sieve/default.sieve
   sieve_default_name = Defaults
   sieve_global = /var/lib/dovecot/sieve
}
pop3_client_workarounds = outlook-no-nuls
pop3_delete_type = default
pop3_deleted_flag =
pop3_enable_last = no
pop3_fast_size_lookups = no
pop3_lock_session = no
pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s
pop3_no_flag_updates = no
pop3_reuse_xuidl = no
pop3_save_uidl = no
pop3_uidl_duplicates = allow
pop3_uidl_format = %08Xu%08Xv
pop3c_features =
pop3c_host =
pop3c_master_user =
pop3c_password =
pop3c_port = 110
pop3c_quick_received_date = no
pop3c_rawlog_dir =
pop3c_ssl = no
pop3c_ssl_verify = yes
pop3c_user = %u
postmaster_address = postmaster@%{if;%d;ne;;%d;%{hostname}}
protocols = " imap lmtp sieve pop3 sieve"
quota_full_tempfail = no
rawlog_dir =
recipient_delimiter = +
rejection_reason = Your message to <%t> was automatically rejected:%n%r
rejection_subject = Rejected: %s
replication_dsync_parameters = -d -N -l 30 -U
replication_full_sync_interval = 1 days
replication_max_conns = 10
replicator_host = replicator
replicator_port = 0
sendmail_path = /usr/sbin/sendmail
service aggregator {
   chroot = .
   client_limit = 0
   drop_priv_before_exec = no
   executable = aggregator
   extra_groups =
   fifo_listener replication-notify-fifo {
     group =
     mode = 0600
     user =
   }
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol =
   service_count = 0
   type =
   unix_listener replication-notify {
     group =
     mode = 0600
     user =
   }
   user = $default_internal_user
   vsz_limit = 18446744073709551615 B
}
service anvil {
   chroot = empty
   client_limit = 0
   drop_priv_before_exec = no
   executable = anvil
   extra_groups =
   group =
   idle_kill = 4294967295 secs
   privileged_group =
   process_limit = 1
   process_min_avail = 1
   protocol =
   service_count = 0
   type = anvil
   unix_listener anvil-auth-penalty {
     group =
     mode = 0600
     user =
   }
   unix_listener anvil {
     group =
     mode = 0600
     user =
   }
   user = $default_internal_user
   vsz_limit = 18446744073709551615 B
}
service auth-worker {
   chroot =
   client_limit = 1
   drop_priv_before_exec = no
   executable = auth -w
   extra_groups =
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol =
   service_count = 1
   type =
   unix_listener auth-worker {
     group =
     mode = 0600
     user = $default_internal_user
   }
   user =
   vsz_limit = 18446744073709551615 B
}
service auth {
   chroot =
   client_limit = 0
   drop_priv_before_exec = no
   executable = auth
   extra_groups =
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 1
   process_min_avail = 0
   protocol =
   service_count = 0
   type =
   unix_listener /var/spool/postfix/private/auth {
     group = postfix
     mode = 0666
     user = postfix
   }
   unix_listener auth-client {
     group =
     mode = 0600
     user = $default_internal_user
   }
   unix_listener auth-login {
     group =
     mode = 0600
     user = $default_internal_user
   }
   unix_listener auth-master {
     group =
     mode = 0600
     user =
   }
   unix_listener auth-userdb {
     group =
     mode = 0666
     user = $default_internal_user
   }
   unix_listener login/login {
     group =
     mode = 0666
     user =
   }
   unix_listener token-login/tokenlogin {
     group =
     mode = 0666
     user =
   }
   user = $default_internal_user
   vsz_limit = 18446744073709551615 B
}
service config {
   chroot =
   client_limit = 0
   drop_priv_before_exec = no
   executable = config
   extra_groups =
   group =
   idle_kill = 4294967295 secs
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol =
   service_count = 0
   type = config
   unix_listener config {
     group =
     mode = 0600
     user =
   }
   user =
   vsz_limit = 18446744073709551615 B
}
service decode2text {
   chroot =
   client_limit = 0
   drop_priv_before_exec = no
   executable = script 
/usr/share/doc/dovecot-core/examples/decode2text.sh
   extra_groups =
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol =
   service_count = 0
   type =
   unix_listener decode2text {
     group =
     mode = 0666
     user =
   }
   user = dovecot
   vsz_limit = 18446744073709551615 B
}
service dict-async {
   chroot =
   client_limit = 0
   drop_priv_before_exec = no
   executable = dict
   extra_groups =
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol =
   service_count = 0
   type =
   unix_listener dict-async {
     group = $default_internal_group
     mode = 0660
     user =
   }
   user = $default_internal_user
   vsz_limit = 18446744073709551615 B
}
service dict {
   chroot =
   client_limit = 1
   drop_priv_before_exec = no
   executable = dict
   extra_groups =
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol =
   service_count = 0
   type =
   unix_listener dict {
     group = $default_internal_group
     mode = 0660
     user =
   }
   user = $default_internal_user
   vsz_limit = 18446744073709551615 B
}
service director {
   chroot = .
   client_limit = 0
   drop_priv_before_exec = no
   executable = director
   extra_groups =
   fifo_listener login/proxy-notify {
     group =
     mode = 00
     user =
   }
   group =
   idle_kill = 4294967295 secs
   inet_listener {
     address =
     haproxy = no
     port = 0
     reuse_port = no
     ssl = no
   }
   privileged_group =
   process_limit = 1
   process_min_avail = 0
   protocol =
   service_count = 0
   type =
   unix_listener director-admin {
     group =
     mode = 0600
     user =
   }
   unix_listener director-userdb {
     group =
     mode = 0600
     user =
   }
   unix_listener login/director {
     group =
     mode = 00
     user =
   }
   user = $default_internal_user
   vsz_limit = 18446744073709551615 B
}
service dns_client {
   chroot =
   client_limit = 1
   drop_priv_before_exec = no
   executable = dns-client
   extra_groups =
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol =
   service_count = 0
   type =
   unix_listener dns-client {
     group =
     mode = 0666
     user =
   }
   user = $default_internal_user
   vsz_limit = 18446744073709551615 B
}
service doveadm {
   chroot =
   client_limit = 1
   drop_priv_before_exec = no
   executable = doveadm-server
   extra_groups = $default_internal_group
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol =
   service_count = 1
   type =
   unix_listener doveadm-server {
     group =
     mode = 0600
     user =
   }
   user =
   vsz_limit = 18446744073709551615 B
}
service imap-hibernate {
   chroot =
   client_limit = 0
   drop_priv_before_exec = no
   executable = imap-hibernate
   extra_groups =
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol = imap
   service_count = 0
   type =
   unix_listener imap-hibernate {
     group = $default_internal_group
     mode = 0660
     user =
   }
   user = $default_internal_user
   vsz_limit = 18446744073709551615 B
}
service imap-login {
   chroot = login
   client_limit = 0
   drop_priv_before_exec = no
   executable = imap-login
   extra_groups =
   group =
   idle_kill = 0
   inet_listener imap {
     address =
     haproxy = no
     port = 143
     reuse_port = no
     ssl = no
   }
   inet_listener imaps {
     address =
     haproxy = no
     port = 993
     reuse_port = no
     ssl = yes
   }
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol = imap
   service_count = 1
   type = login
   user = $default_login_user
   vsz_limit = 18446744073709551615 B
}
service imap-urlauth-login {
   chroot = token-login
   client_limit = 0
   drop_priv_before_exec = no
   executable = imap-urlauth-login
   extra_groups =
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol = imap
   service_count = 1
   type = login
   unix_listener imap-urlauth {
     group =
     mode = 0666
     user =
   }
   user = $default_login_user
   vsz_limit = 18446744073709551615 B
}
service imap-urlauth-worker {
   chroot =
   client_limit = 1
   drop_priv_before_exec = no
   executable = imap-urlauth-worker
   extra_groups = $default_internal_group
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 1024
   process_min_avail = 0
   protocol = imap
   service_count = 1
   type =
   unix_listener imap-urlauth-worker {
     group =
     mode = 0600
     user = $default_internal_user
   }
   user =
   vsz_limit = 18446744073709551615 B
}
service imap-urlauth {
   chroot =
   client_limit = 1
   drop_priv_before_exec = no
   executable = imap-urlauth
   extra_groups =
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 1024
   process_min_avail = 0
   protocol = imap
   service_count = 1
   type =
   unix_listener token-login/imap-urlauth {
     group =
     mode = 0666
     user =
   }
   user = $default_internal_user
   vsz_limit = 18446744073709551615 B
}
service imap {
   chroot =
   client_limit = 1
   drop_priv_before_exec = no
   executable = imap
   extra_groups = $default_internal_group
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 1024
   process_min_avail = 0
   protocol = imap
   service_count = 1
   type =
   unix_listener imap-master {
     group =
     mode = 0600
     user =
   }
   unix_listener login/imap {
     group =
     mode = 0666
     user =
   }
   user =
   vsz_limit = 18446744073709551615 B
}
service indexer-worker {
   chroot =
   client_limit = 1
   drop_priv_before_exec = no
   executable = indexer-worker
   extra_groups = $default_internal_group
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 10
   process_min_avail = 0
   protocol =
   service_count = 0
   type =
   unix_listener indexer-worker {
     group =
     mode = 0600
     user = $default_internal_user
   }
   user =
   vsz_limit = 18446744073709551615 B
}
service indexer {
   chroot =
   client_limit = 0
   drop_priv_before_exec = no
   executable = indexer
   extra_groups =
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 1
   process_min_avail = 0
   protocol =
   service_count = 0
   type =
   unix_listener indexer {
     group =
     mode = 0666
     user =
   }
   user = $default_internal_user
   vsz_limit = 18446744073709551615 B
}
service ipc {
   chroot = empty
   client_limit = 0
   drop_priv_before_exec = no
   executable = ipc
   extra_groups =
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 1
   process_min_avail = 0
   protocol =
   service_count = 0
   type =
   unix_listener ipc {
     group =
     mode = 0600
     user = $default_internal_user
   }
   unix_listener login/ipc-proxy {
     group =
     mode = 0600
     user = $default_login_user
   }
   user = $default_internal_user
   vsz_limit = 18446744073709551615 B
}
service lmtp {
   chroot =
   client_limit = 1
   drop_priv_before_exec = no
   executable = lmtp
   extra_groups = $default_internal_group
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol = lmtp
   service_count = 0
   type =
   unix_listener /var/spool/postfix/private/dovecot-lmtp {
     group = postfix
     mode = 0600
     user = postfix
   }
   unix_listener lmtp {
     group =
     mode = 0666
     user =
   }
   user =
   vsz_limit = 18446744073709551615 B
}
service log {
   chroot =
   client_limit = 0
   drop_priv_before_exec = no
   executable = log
   extra_groups =
   group =
   idle_kill = 4294967295 secs
   privileged_group =
   process_limit = 1
   process_min_avail = 0
   protocol =
   service_count = 0
   type = log
   unix_listener log-errors {
     group =
     mode = 0600
     user =
   }
   user =
   vsz_limit = 18446744073709551615 B
}
service managesieve-login {
   chroot = login
   client_limit = 0
   drop_priv_before_exec = no
   executable = managesieve-login
   extra_groups =
   group =
   idle_kill = 0
   inet_listener sieve {
     address =
     haproxy = no
     port = 4190
     reuse_port = no
     ssl = no
   }
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol = sieve
   service_count = 1
   type = login
   user = $default_login_user
   vsz_limit = 18446744073709551615 B
}
service managesieve {
   chroot =
   client_limit = 1
   drop_priv_before_exec = no
   executable = managesieve
   extra_groups =
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol = sieve
   service_count = 1
   type =
   unix_listener login/sieve {
     group =
     mode = 0666
     user =
   }
   user =
   vsz_limit = 18446744073709551615 B
}
service old-stats {
   chroot = empty
   client_limit = 0
   drop_priv_before_exec = no
   executable = old-stats
   extra_groups =
   fifo_listener old-stats-mail {
     group =
     mode = 0600
     user =
   }
   fifo_listener old-stats-user {
     group =
     mode = 0600
     user =
   }
   group =
   idle_kill = 4294967295 secs
   privileged_group =
   process_limit = 1
   process_min_avail = 0
   protocol =
   service_count = 0
   type =
   unix_listener old-stats {
     group =
     mode = 0600
     user =
   }
   user = $default_internal_user
   vsz_limit = 18446744073709551615 B
}
service pop3-login {
   chroot = login
   client_limit = 0
   drop_priv_before_exec = no
   executable = pop3-login
   extra_groups =
   group =
   idle_kill = 0
   inet_listener pop3 {
     address =
     haproxy = no
     port = 110
     reuse_port = no
     ssl = no
   }
   inet_listener pop3s {
     address =
     haproxy = no
     port = 995
     reuse_port = no
     ssl = yes
   }
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol = pop3
   service_count = 1
   type = login
   user = $default_login_user
   vsz_limit = 18446744073709551615 B
}
service pop3 {
   chroot =
   client_limit = 1
   drop_priv_before_exec = no
   executable = pop3
   extra_groups = $default_internal_group
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 1024
   process_min_avail = 0
   protocol = pop3
   service_count = 1
   type =
   unix_listener login/pop3 {
     group =
     mode = 0666
     user =
   }
   user =
   vsz_limit = 18446744073709551615 B
}
service replicator {
   chroot =
   client_limit = 0
   drop_priv_before_exec = no
   executable = replicator
   extra_groups =
   group =
   idle_kill = 4294967295 secs
   privileged_group =
   process_limit = 1
   process_min_avail = 0
   protocol =
   service_count = 0
   type =
   unix_listener replicator-doveadm {
     group =
     mode = 00
     user = $default_internal_user
   }
   unix_listener replicator {
     group =
     mode = 0600
     user = $default_internal_user
   }
   user =
   vsz_limit = 18446744073709551615 B
}
service stats {
   chroot = empty
   client_limit = 0
   drop_priv_before_exec = no
   executable = stats
   extra_groups =
   group =
   idle_kill = 4294967295 secs
   privileged_group =
   process_limit = 1
   process_min_avail = 0
   protocol =
   service_count = 0
   type =
   unix_listener stats-reader {
     group =
     mode = 0600
     user =
   }
   unix_listener stats-writer {
     group = $default_internal_group
     mode = 0660
     user =
   }
   user = $default_internal_user
   vsz_limit = 18446744073709551615 B
}
service submission-login {
   chroot = login
   client_limit = 0
   drop_priv_before_exec = no
   executable = submission-login
   extra_groups =
   group =
   idle_kill = 0
   inet_listener submission {
     address =
     haproxy = no
     port = 587
     reuse_port = no
     ssl = no
   }
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol = submission
   service_count = 1
   type = login
   user = $default_login_user
   vsz_limit = 18446744073709551615 B
}
service submission {
   chroot =
   client_limit = 1
   drop_priv_before_exec = no
   executable = submission
   extra_groups = $default_internal_group
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 1024
   process_min_avail = 0
   protocol = submission
   service_count = 1
   type =
   unix_listener login/submission {
     group =
     mode = 0666
     user =
   }
   user =
   vsz_limit = 18446744073709551615 B
}
service tcpwrap {
   chroot =
   client_limit = 1
   drop_priv_before_exec = no
   executable = tcpwrap
   extra_groups =
   group =
   idle_kill = 0
   privileged_group =
   process_limit = 0
   process_min_avail = 0
   protocol =
   service_count = 0
   type =
   user = $default_internal_user
   vsz_limit = 18446744073709551615 B
}
shutdown_clients = yes
ssl = required
ssl_alt_cert =
ssl_alt_key =
ssl_ca =
ssl_cert = </etc/letsencrypt/live/email.example.com/fullchain.pem
ssl_cert_username_field = commonName
ssl_cipher_list = 
ALL:!kRSA:!SRP:!kDHd:!DSS:!aNULL:!eNULL:!EXPORT:!DES:!3DES:!MD5:!PSK:!RC4:!ADH:!LOW at STRENGTH
ssl_client_ca_dir = /etc/ssl/certs
ssl_client_ca_file =
ssl_client_cert =
ssl_client_key =
ssl_crypto_device =
ssl_curve_list =
ssl_dh = # hidden, use -P to show it
ssl_key = # hidden, use -P to show it
ssl_key_password =
ssl_min_protocol = TLSv1
ssl_options =
ssl_prefer_server_ciphers = no
ssl_require_crl = yes
ssl_verify_client_cert = no
state_dir = /var/lib/dovecot
stats_writer_socket_path = stats-writer
submission_client_workarounds =
submission_host =
submission_logout_format = in=%i out=%o
submission_max_mail_size = 40 M
submission_max_recipients = 0
submission_relay_command_timeout = 5 mins
submission_relay_connect_timeout = 30 secs
submission_relay_host =
submission_relay_master_user =
submission_relay_max_idle_time = 29 mins
submission_relay_password =
submission_relay_port = 25
submission_relay_rawlog_dir =
submission_relay_ssl = no
submission_relay_ssl_verify = yes
submission_relay_trusted = no
submission_relay_user =
submission_ssl = no
submission_timeout = 30 secs
syslog_facility = mail
userdb {
   args =
   auth_verbose = default
   default_fields =
   driver = passwd
   name =
   override_fields =
   result_failure = continue
   result_internalfail = continue
   result_success = return-ok
   skip = never
}
valid_chroot_dirs =
verbose_proctitle = no
verbose_ssl = no
version_ignore = no
protocol lmtp {
   mail_plugins = " fts fts_solr sieve"
}




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