Всем привет!
Бьюсь уже который день с почтой, не могу победить. Ошибку получаю при проверке почты через telnet:
# telnet localhost 143
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
* OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ STARTTLS AUTH=PLAIN AUTH=LOGIN] Dovecot ready.
a login admin ********
a OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS BINARY MOVE SNIPPET=FUZZY LITERAL+ NOTIFY SPECIAL-USE] Logged in
b select inbox
b NO [SERVERBUG] Internal error occurred. Refer to server log for more information. [2020-01-22 18:24:10] (0.001 + 0.000 secs).
Судя по логам, почта приходит, но посмотреть я её не могу

Конфиги переписывал много раз уже, поэтому там может быть "мусор".
# doveconf -n
Спойлер
# 2.3.5 (513208660): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.5 (2483b085)
# OS: Linux 4.9.196-std-def-alt0.M80P.1 x86_64 ALT 8.2 Server
# Hostname: server.kini24.ru
auth_default_realm = kini24.ru
auth_mechanisms = plain login
disable_plaintext_auth = no
mail_location = mbox:~/mail:INBOX=/var/mail/%u
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_write_locks = fcntl
namespace inbox {
inbox = yes
location =
mailbox Drafts {
special_use = \Drafts
}
mailbox Junk {
special_use = \Junk
}
mailbox Sent {
special_use = \Sent
}
mailbox "Sent Messages" {
special_use = \Sent
}
mailbox Trash {
special_use = \Trash
}
prefix =
}
passdb {
driver = pam
}
passdb {
args = /etc/dovecot/ldap.conf
driver = ldap
}
plugin {
sieve = file:~/sieve;active=~/.dovecot.sieve
}
postmaster_address = postmaster@kini24.ru
service auth {
unix_listener /var/spool/postfix/private/auth {
group = postfix
mode = 0660
user = postfix
}
user = dovecot
}
service imap-login {
inet_listener imap {
port = 143
}
inet_listener imaps {
port = 993
ssl = yes
}
}
service lmtp {
unix_listener lmtp {
group = postfix
mode = 0660
user = postfix
}
}
service pop3-login {
inet_listener pop3 {
port = 110
}
inet_listener pop3s {
port = 995
ssl = yes
}
}
service submission-login {
inet_listener submission {
port = 587
}
}
ssl_cert = </etc/letsencrypt/live/kini24.ru/fullchain.pem
ssl_dh = # hidden, use -P to show it
ssl_key = # hidden, use -P to show it
userdb {
driver = passwd
}
userdb {
args = /etc/dovecot/ldap.conf
driver = ldap
}
# postconf -n
Спойлер
alias_database = cdb:/etc/postfix/aliases
alias_maps = cdb:/etc/postfix/aliases
biff = no
body_checks = regexp:/etc/postfix/body_checks
config_directory = /etc/postfix
content_filter = scan:127.0.0.1:10026
delay_warning_time = 1h
disable_vrfy_command = yes
header_checks = regexp:/etc/postfix/header_checks
inet_protocols = ipv4
mailbox_command = /usr/libexec/dovecot/dovecot-lda -f "$SENDER" -a "$RECIPIENT"
mailbox_size_limit = 0
mailbox_unpriv_delivery = no
message_size_limit = 52428800
milter_header_checks = $header_checks
mydestination = $mydomain, localhost.$mydomain, localhost
mydomain = kini24.ru
myhostname = $mydomain
mynetworks = $config_directory/mynetworks
myorigin = $mydomain
receive_override_options = no_address_mappings
recipient_bcc_maps = hash:/etc/postfix/recipient_bcc
recipient_delimiter = +
relayhost =
smtp_body_checks = $body_checks
smtp_header_checks = $header_checks
smtp_tls_mandatory_protocols = !SSLv2,!SSLv3
smtp_tls_note_starttls_offer = yes
smtp_use_tls = yes
smtpd_banner = $myhostname ESMTP
smtpd_client_restrictions = check_recipient_access cdb:/etc/postfix/whitelist, permit_mynetworks, permit_sasl_authenticated, check_client_access cdb:/etc/postfix/client_access, reject_rbl_client zen.spamhaus.org, permit
smtpd_delay_reject = no
smtpd_helo_required = yes
smtpd_helo_restrictions = check_recipient_access cdb:/etc/postfix/whitelist, permit_mynetworks, permit_sasl_authenticated, check_helo_access cdb:/etc/postfix/helo_access, reject_invalid_hostname, permit
smtpd_recipient_restrictions = check_recipient_access cdb:/etc/postfix/recipient_access, permit_mynetworks, permit_sasl_authenticated, reject_non_fqdn_recipient, reject_unknown_recipient_domain, reject_unauth_destination, permit
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_tls_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sender_restrictions = check_recipient_access cdb:/etc/postfix/whitelist, permit_mynetworks, permit_sasl_authenticated, check_sender_access cdb:/etc/postfix/sender_access, reject_non_fqdn_sender, reject_unknown_sender_domain, permit
smtpd_tls_auth_only = no
smtpd_tls_cert_file = /etc/letsencrypt/live/kini24.ru/fullchain.pem
smtpd_tls_key_file = /etc/letsencrypt/live/kini24.ru/privkey.pem
smtpd_tls_mandatory_protocols = !SSLv2,!SSLv3
smtpd_tls_received_header = yes
smtpd_use_tls = yes
Пробовал сносить postfix + dovecot + все зависимости, настраивал все заново. Пробовал также настраивать через альтератор. Всё безрезультатно. В логах ошибок нет, несмотря на попытки включения отладки (почему dovecot, кстати, не реагирует на auth_debug и подобные вещи в dovecot.conf?)