Good day,

I just discovered a core file from dovecot's imap.

It is running on OpenBSD 7.6 and dovecot is built with https://github.com/dovecot/core/pull/223

Stacktrace:

#0  fts_search_merge_scores_or (dest=0x73b552104f38, src=<optimized out>) at fts-search.c:278
        src2 = <error reading variable src2 (Cannot access memory at address 0x8)>
        src_map = 0xc7d7dcb6028
        src2_map = 0xc7d6338d5c0
        src2i = 3157
        srci = 8699
        src_count = 6133
        src2_count = 5729
#1  fts_search_merge_scores_level (fctx=0xc7df32c4000, args=0xc7dc4e9a110, idx=0x73b552105064, and_args=<optimized out>, scores=0x73b552104f38)
    at fts-search.c:333
        arg_scores = {arr = {buffer = 0xc7e01e35468, element_size = 8}, v = 0xc7e01e35468, v_modifiable = 0xc7e01e35468}
        level = <optimized out>
#2  0x00000c7da13ccabe in fts_search_merge_scores_level (fctx=0xc7df32c4000, args=0xc7dc4e99ca0, idx=0x73b552105064, and_args=<optimized out>, 
    scores=0x73b552104fc8) at fts-search.c:326
        arg_scores = {arr = {buffer = 0xc7e01e34860, element_size = 8}, v = 0xc7e01e34860, v_modifiable = 0xc7e01e34860}
        level = <optimized out>
#3  0x00000c7da13ccabe in fts_search_merge_scores_level (fctx=0xc7df32c4000, args=0xc7e24477628, idx=0x73b552105064, and_args=<optimized out>, 
    scores=0xc7daf51ea28) at fts-search.c:326
        arg_scores = {arr = {buffer = 0xc7e01e345f8, element_size = 8}, v = 0xc7e01e345f8, v_modifiable = 0xc7e01e345f8}
        level = <optimized out>
#4  0x00000c7da13cbf07 in fts_search_merge_scores (fctx=0xc7df32c4000) at fts-search.c:341
        idx = 8
#5  fts_search_try_lookup (fctx=0xc7df32c4000) at fts-search.c:373
        last_uid = <optimized out>
        seq1 = <optimized out>
        seq2 = 0
#6  fts_search_lookup (fctx=0xc7df32c4000) at fts-search.c:383
        reason = <optimized out>
#7  0x00000c7da13cefb4 in fts_try_build_init (ctx=0xc7daf52b640, fctx=0xc7df32c4000) at fts-storage.c:147
        ret = 8699
#8  fts_mailbox_search_init (t=<optimized out>, args=0xc7dd96dd048, sort_program=<optimized out>, wanted_fields=<optimized out>, 
    wanted_headers=<optimized out>) at fts-storage.c:262
        ft = 0xc7df32dec00
        fbox = <optimized out>
        flist = <optimized out>
        ctx = 0xc7daf52b640
        fctx = 0xc7df32c4000
#9  0x00000c7b3879aef3 in imap_search_start (ctx=0xc7df32dfbc8, sargs=0xc7dd96dd048, sort_program=0x0) at imap-search.c:537
        cmd = 0xc7df32df848
#10 0x00000c7b38789e6e in cmd_search (cmd=0xc7df32df848) at cmd-search.c:48
        args = <optimized out>
        ctx = 0xc7df32dfbc8
        ret = 8699
        charset = <optimized out>
        sargs = 0x0
#11 0x00000c7b38792db3 in command_exec (cmd=0xc7df32df848) at imap-commands.c:201
        hook = <optimized out>
        finished = <optimized out>
#12 0x00000c7b387915d8 in client_command_input (cmd=0xc7df32df848) at imap-client.c:1237
        client = 0xc7df32bc048
        command = <optimized out>
        tag = <optimized out>
        ret = <optimized out>
        name = <optimized out>
#13 0x00000c7b38791749 in client_command_input (cmd=0xc7df32df848) at imap-client.c:1305
        client = 0xc7df32bc048
        command = <optimized out>
        tag = <optimized out>
        ret = <optimized out>
        name = <optimized out>
#14 0x00000c7b38791749 in client_command_input (cmd=0xc7df32df848) at imap-client.c:1305
        client = 0xc7df32bc048
        command = <optimized out>
        tag = <optimized out>
        ret = <optimized out>
        name = <optimized out>
#15 0x00000c7b3878ff68 in client_handle_next_command (client=0xc7df32bc048, remove_io_r=<optimized out>) at imap-client.c:1348
No locals.
#16 client_handle_input (client=0xc7df32bc048) at imap-client.c:1363
        _data_stack_cur_id = <optimized out>
        handled_commands = <optimized out>
        ret = <optimized out>
        remove_io = <optimized out>
#17 0x00000c7b3878e569 in client_input (client=0xc7df32bc048) at imap-client.c:1407
        output = 0xc7daf5003a0
        bytes = 251
        cmd = <optimized out>
#18 0x00000c7dc9c7ff3f in io_loop_call_io (io=0xc7daf515240) at ioloop.c:737
        ioloop = 0xc7daf520460
        t_id = 8699
#19 0x00000c7dc9c830a4 in io_loop_handler_run_internal (ioloop=0xc7daf520460) at ioloop-kqueue.c:164
        tv = {tv_sec = 4, tv_usec = 790941}
        ts = {tv_sec = 4, tv_nsec = 790941000}
        ctx = 0xc7daf503520
        msecs = <optimized out>
        events = <optimized out>
        events_count = <optimized out>
        ret = <optimized out>
        i = 0
        io = 0xc7daf515240
        event = <optimized out>
#20 0x00000c7dc9c806a0 in io_loop_handler_run (ioloop=0xc7daf520460) at ioloop.c:789
No locals.
#21 0x00000c7dc9c804a8 in io_loop_run (ioloop=0xc7daf520460) at ioloop.c:762
No locals.
#22 0x00000c7dc9bd56b9 in master_service_run (service=0xc7daf52b500, callback=0x0) at master-service.c:878
No locals.
#23 0x00000c7b387a19d0 in main (argc=1, argv=<optimized out>) at main.c:575
        set_roots = {0xc7dc9ccd480 <smtp_submit_setting_parser_info>, 0xc7b387af1b0 <imap_setting_parser_info>, 0x0}
        login_set = {auth_socket_path = 0xc7e01e2f550 "\004", postlogin_socket_path = 0x0, postlogin_timeout_secs = 60, 
          callback = 0xc7b387a1bc0 <login_client_connected>, failure_callback = 0xc7b387a1f40 <login_client_failed>, update_proctitle = false, 
          request_auth_token = true}
        service_flags = <optimized out>
        storage_service_flags = <optimized out>
        username = <optimized out>
        auth_socket_path = <optimized out>
        c = <optimized out>
        error = 0xc7e056c4af0 <_dl_dtors> "\363\017\036\372UH\211\345\350s\030"

config:

# 2.3.21.1 (d492236fa0): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.21.1 (49005e73)
# OS: OpenBSD 7.6 amd64  
# Hostname: mx1.catap.net
# 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
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_log_only = no
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 session_id=%{session}
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 = %Lu
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/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 = 10 G
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 = %Lu
disable_plaintext_auth = yes
dotlock_use_excl = yes
doveadm_allowed_commands = 
doveadm_api_key = 
doveadm_http_rawlog_dir = 
doveadm_password = # hidden, use -P to show it
doveadm_port = 12345
doveadm_socket_path = doveadm-server
doveadm_ssl = no
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 = 1000
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
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/local/libexec/dovecot
listen = *, ::
lmtp_add_received_header = no
lmtp_client_workarounds = 
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
lmtp_verbose_replies = no
lock_method = fcntl
log_core_filter = 
log_debug = 
log_path = syslog
log_timestamp = "%b %d %H:%M:%S "
login_access_sockets = 
login_greeting = Dovecot 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/local/lib/dovecot/login
login_plugins = 
login_proxy_max_disconnect_delay = 0
login_proxy_max_reconnects = 3
login_proxy_notify_path = proxy-notify
login_proxy_rawlog_dir = 
login_proxy_timeout = 30 secs
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 = file:%h/Maildir/dovecot-attributes
mail_cache_fields = flags
mail_chroot = 
mail_debug = no
mail_fsync = optimized
mail_full_filesystem_access = no
mail_gid = vmail
mail_home = 
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/local/lib/dovecot
mail_plugins = notify fts fts_flatcurve replication virtual
mail_prefetch_count = 0
mail_privileged_group = 
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 = vmail
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 Pigeonhole
managesieve_logout_format = bytes=%i/%o
managesieve_max_compile_errors = 5
managesieve_max_line_length = 64 k
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
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
mdbox_preallocate_space = no
mdbox_rotate_interval = 0
mdbox_rotate_size = 10 M
mmap_disable = yes
namespace inbox {
  disabled = no
  hidden = no
  ignore_on_failure = no
  inbox = yes
  list = yes
  location = 
  mailbox Archive {
    auto = subscribe
    autoexpunge = 0
    autoexpunge_max_mails = 0
    comment = 
    driver = 
    special_use = \Archive
  }
  mailbox Drafts {
    auto = subscribe
    autoexpunge = 0
    autoexpunge_max_mails = 0
    comment = 
    driver = 
    special_use = \Drafts
  }
  mailbox Junk {
    auto = subscribe
    autoexpunge = 60 days
    autoexpunge_max_mails = 0
    comment = 
    driver = 
    special_use = \Junk
  }
  mailbox Sent {
    auto = subscribe
    autoexpunge = 0
    autoexpunge_max_mails = 0
    comment = 
    driver = 
    special_use = \Sent
  }
  mailbox Trash {
    auto = subscribe
    autoexpunge = 60 days
    autoexpunge_max_mails = 0
    comment = 
    driver = 
    special_use = \Trash
  }
  order = 0
  prefix = 
  separator = .
  subscriptions = yes
  type = private
}
namespace virtual {
  disabled = no
  hidden = no
  ignore_on_failure = no
  inbox = no
  list = yes
  location = virtual:/etc/dovecot/virtual:INDEX=~/virtual
  mailbox All {
    auto = no
    autoexpunge = 0
    autoexpunge_max_mails = 0
    comment = All messages without Trash and Junk
    driver = 
    special_use = \All
  }
  mailbox Flagged {
    auto = no
    autoexpunge = 0
    autoexpunge_max_mails = 0
    comment = All flagged messages without Trash and Junk
    driver = 
    special_use = \Flagged
  }
  order = 0
  prefix = virtual.
  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 = username_format=%u /etc/mail/credentials
  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 = 
}
plugin {
  fts = flatcurve
  fts_decoder = decode2text
  fts_filters = normalizer-icu snowball stopwords
  fts_filters_en = lowercase snowball english-possessive stopwords
  fts_flatcurve_substring_search = yes
  fts_languages = en de ru es
  fts_tokenizer_generic = algorithm=simple
  fts_tokenizers = generic email-address
  mail_replica = tcps:mx2.catap.net
  replication_sync_timeout = 10
  sieve = file:~/sieve;active=~/.dovecot.sieve
  sieve_before = /etc/dovecot/sieve_before.d/
}
pop3_client_workarounds = 
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}}
process_shutdown_filter = 
protocols = imap lmtp 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 -l 30 -U -x virtual.
replication_full_sync_interval = 5 mins
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 = vmail
    mode = 0600
    user = vmail
  }
  group = 
  idle_kill = 0
  privileged_group = 
  process_limit = 0
  process_min_avail = 0
  protocol = 
  service_count = 0
  type = 
  unix_listener replication-notify {
    group = vmail
    mode = 0600
    user = vmail
  }
  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 = 0
  type = worker
  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 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 = vmail
    mode = 0660
    user = vmail
  }
  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/local/libexec/dovecot/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 = vmail
  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 = 
  }
  unix_listener login/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
  inet_listener {
    address = 
    haproxy = no
    port = 12345
    reuse_port = no
    ssl = yes
  }
  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 health-check {
  chroot = 
  client_limit = 1
  drop_priv_before_exec = yes
  executable = script -p health-check.sh
  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
}
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 = worker
  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 = vmail
  idle_kill = 0
  privileged_group = 
  process_limit = 0
  process_min_avail = 0
  protocol = lmtp
  service_count = 0
  type = 
  unix_listener lmtp {
    group = 
    mode = 0666
    user = 
  }
  user = vmail
  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 = 1
  protocol = 
  service_count = 0
  type = 
  unix_listener replicator-doveadm {
    group = vmail
    mode = 0600
    user = vmail
  }
  unix_listener replicator {
    group = 
    mode = 0600
    user = $default_internal_user
  }
  user = 
  vsz_limit = 18446744073709551615 B
}
service stats {
  chroot = 
  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 login/stats-writer {
    group = 
    mode = 0600
    user = $default_login_user
  }
  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
  }
  inet_listener submissions {
    address = 
    haproxy = no
    port = 0
    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
}
shutdown_clients = yes
ssl = yes
ssl_alt_cert = 
ssl_alt_key = 
ssl_ca = 
ssl_cert = </etc/ssl/mx.catap.net.crt
ssl_cert_username_field = commonName
ssl_cipher_list = ALL:!kRSA:!SRP:!kDHd:!DSS:!aNULL:!eNULL:!EXPORT:!DES:!3DES:!MD5:!PSK:!RC4:!ADH:!LOW@STRENGTH
ssl_cipher_suites = 
ssl_client_ca_dir = 
ssl_client_ca_file = 
ssl_client_cert = 
ssl_client_key = 
ssl_client_require_valid_cert = yes
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 = TLSv1.2
ssl_options = 
ssl_prefer_server_ciphers = no
ssl_require_crl = yes
ssl_verify_client_cert = no
state_dir = /var/dovecot
stats_http_rawlog_dir = 
stats_writer_socket_path = stats-writer
submission_client_workarounds = 
submission_host = 
submission_logout_format = in=%i out=%o
submission_max_mail_size = 0
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 = username_format=%u /etc/mail/credentials
  auth_verbose = default
  default_fields = 
  driver = passwd-file
  name = 
  override_fields = uid=vmail gid=vmail home=/var/vmail/%u
  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 = notify fts fts_flatcurve replication virtual sieve
}
protocol imap {
  imap_metadata = yes
  mail_max_userip_connections = 1000
}

-- wbr, Kirill