hello Aki, thanks for repsonse. dovecot -n inline.
There is an auth formt line
Ivan
2.3.16 (7e2e900c1a): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.16 (09c29328) # OS: Linux 6.8.0-1015-aws aarch64 Ubuntu 22.04.5 LTS ext4 # Hostname: localhost auth_debug = yes auth_debug_passwords = yes auth_mechanisms = plain login auth_username_format = %n auth_verbose = yes info_log_path = /var/log/dovecot.log mail_debug = yes mail_home = /home/virtualmailboxes/%d/%n mail_location = mbox:/home/virtualmailboxes/%d/%u mail_privileged_group = mail namespace { inbox = yes location = mailbox { auto = create special_use = \Drafts name = Drafts } mailbox { special_use = \Junk name = Junk } mailbox { auto = create special_use = \Sent name = Sent } mailbox { special_use = \Sent name = Sent Messages } mailbox { auto = create special_use = \Trash name = Trash } prefix = name = inbox } passdb { driver = pam } protocols = imap lmtp imap lmtp service replication-notify-fifo { name = aggregator } service anvil-auth-penalty { name = anvil } service auth-worker { name = auth-worker } service { unix_listener { group = postfix mode = 0666 user = postfix path = /var/spool/postfix/private/auth } name = auth } service config { name = config } service dict-async { name = dict-async } service dict { name = dict } service login/proxy-notify { name = director } service dns-client { name = dns-client } service doveadm-server { name = doveadm } service imap-hibernate { name = imap-hibernate } service imap { inet_listener { port = 993 ssl = yes name = imaps } name = imap-login } service { executable = script-login /usr/local/bin/postlogin.sh user = $default_internal_user name = imap-postlogin } service imap-urlauth { name = imap-urlauth-login } service imap-urlauth-worker { name = imap-urlauth-worker } service token-login/imap-urlauth { name = imap-urlauth } service imap-master { name = imap } service indexer-worker { name = indexer-worker } service indexer { name = indexer } service ipc { name = ipc } service { unix_listener { group = postfix mode = 0600 user = postfix path = /var/spool/postfix/private/dovecot-lmtp } name = lmtp } service log-errors { name = log } service old-stats-mail { name = old-stats } service pop3 { name = pop3-login } service login/pop3 { name = pop3 } service replicator-doveadm { name = replicator } service stats-reader { name = stats } service submission { name = submission-login } service login/submission { name = submission } ssl_cert =