Hello Aki. Here it is. Some sensitive data was replaced by ***. # 2.2.25 (7be1766): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.15 (97b3da0) # OS: Linux 3.10.0-***.el7.x86_64 x86_64 CentOS Linux release 7.*** (Core) ext4 auth_cache_negative_ttl = 15 secs auth_cache_size = 8 M auth_cache_ttl = 15 secs auth_default_realm = *** auth_mechanisms = plain login digest-md5 cram-md5 ntlm auth_username_chars = abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.,;=-_@ auth_username_format = %LTn@%LTd auth_verbose = yes auth_worker_max_count = 64 dict { last_login = mysql:/etc/dovecot/mailserver/last_login.dbconf sieve = mysql:/etc/dovecot/mailserver/sieve.dbconf } disable_plaintext_auth = no import_environment = TZ listen = * lock_method = dotlock log_timestamp = %F %T login_greeting = *** Mail Server ready and serving (LXmail01). mail_attachment_dir = /mailboxes/%1.16Nu/%Ld/.attachments mail_attachment_hash = %{sha256}.%{size} mail_attachment_min_size = 64 k mail_cache_min_mail_count = 32 mail_gid = mailbox mail_home = /mailboxes/%1.16Nu/%Ld/%2.256Nn/%Ln mail_location = mdbox:/mailboxes/%1.16Nu/%Ld/%2.256Nn/%Ln mail_max_keyword_length = 64 mail_plugins = quota fts fts_lucene zlib mail_uid = mailbox mailbox_idle_check_interval = 1 mins 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 mdbox_rotate_interval = 90 days mdbox_rotate_size = 4 M namespace { inbox = yes location = mailbox Drafts { auto = no special_use = \Drafts } mailbox Sent { auto = subscribe special_use = \Sent } mailbox Spam { auto = create special_use = \Junk } mailbox Trash { auto = no special_use = \Trash } prefix = separator = / } passdb { args = /etc/dovecot/mailserver/mysql.dbconf driver = sql } plugin { fts = lucene fts_autoindex = yes fts_autoindex_max_recent_msgs = 65536 fts_index_timeout = 900 fts_lucene = whitespace_chars=@.,;-/ last_login_dict = proxy::last_login last_login_key = last_login/%u quota = dict:user quota::file:%h/.quota quota_rule = *:bytes=2684354560 quota_rule2 = Trash:bytes=+10%% quota_rule3 = Spam:bytes=+10%% sieve = dict:proxy::sieve;name=%Lu;bindir=/mail_local/sieve/cache sieve_dir = ~/sieve sieve_global_dir = /mail_local/sieve/global sieve_max_actions = 32 sieve_max_redirects = 4 sieve_max_script_size = 16K sieve_user_log = /mail_local/sieve/logs/%Lu.log sieve_vacation_dont_check_recipient = yes sieve_vacation_max_period = 0 sieve_vacation_min_period = 0 zlib_save = xz zlib_save_level = 1 } service anvil { client_limit = 6666 } service auth { client_limit = 6666 unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-master { group = mailbox mode = 0600 user = mailbox } user = $default_internal_user } service auth_worker { user = root } service dict { unix_listener dict { group = mailbox mode = 0600 user = mailbox } } service imap-login { chroot = login client_limit = 2048 inet_listener imaps { address = * } process_limit = 2048 process_min_avail = 1 service_count = 1 user = dovecot } service imap { drop_priv_before_exec = no process_limit = 2048 } service indexer-worker { process_limit = 2 } service ipc { unix_listener ipc { group = mode = 0600 user = } unix_listener login/ipc-proxy { group = dovecot mode = 0660 user = $default_login_user } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } unix_listener lmtp { group = mailbox mode = 0600 user = mailbox } } service pop3-login { chroot = login client_limit = 2048 inet_listener pop3s { address = * } process_limit = 2048 process_min_avail = 1 service_count = 1 user = dovecot } service pop3 { drop_priv_before_exec = no process_limit = 2048 } shutdown_clients = no ssl_cert =

Hi!

Could you provide your doveconf -n so we could debug this?

Aki