dagent log error - Client disconnected

Hello Forum,

after updating to 8.5.4.0 from offical stable repo, my dagent is delivering as usual, but just logs errors like

Wed Mar  7 08:44:10 2018: [error  ] [15541] Autoresponder failed
Wed Mar  7 08:44:19 2018: [error  ] [15566] Client disconnected
Wed Mar  7 08:45:19 2018: [error  ] [15894] Client disconnected
Wed Mar  7 08:45:19 2018: [error  ] [15936] Client disconnected
Wed Mar  7 08:45:20 2018: [error  ] [15931] Client disconnected
Wed Mar  7 08:49:38 2018: [error  ] [16799] Autoresponder failed

my dagent.cfg says its in info-logging:

# DAGENT LOG SETTINGS

# Logging method (syslog, file)
log_method      =       file

# Loglevel (0(none), 1(crit), 2(err), 3(warn), 4(notice), 5(info), 6(debug))
log_level       = 5

# Logfile for log_method = file, use '-' for stderr
log_file = /var/log/kopano/dagent.log

# Log timestamp - prefix each log line with timestamp in 'file' logging mode
log_timestamp   =       1

# Log raw message to a file
log_raw_message = no

and it SHOULD log something like:

Mon Mar  5 03:45:03 2018: [info   ] [18353] Delivered message to "postmaster", Subject: "Logwatch for ftp001.domain.de (Linux)", Message-Id: <20180305024503.2BC75F3211@ftp001.domain.de>, size 4134
Mon Mar  5 03:45:03 2018: [info   ] [18353] Finished processing message
Mon Mar  5 03:45:03 2018: [info   ] [18353] LMTP thread exiting
Mon Mar  5 04:00:02 2018: [info   ] [10000] Accepted connection from 127.0.0.1:52082
Mon Mar  5 04:00:02 2018: [info   ] [19728] Starting worker for LMTP request pid 19728
Mon Mar  5 04:00:02 2018: [notice ] [19728] Resolved recipient mailarchiv@domain.de as user mailarchiv
Mon Mar  5 04:00:02 2018: [notice ] [19728] Resolved recipient postmaster@domain.de as user postmaster
Mon Mar  5 04:00:02 2018: [info   ] [19728] * Loading plugins started
Mon Mar  5 04:00:02 2018: [info   ] [19728] ** Checking plugins in /var/lib/kopano/dagent/plugins
Mon Mar  5 04:00:02 2018: [info   ] [19728] * Loading plugins done
Mon Mar  5 04:00:02 2018: [info   ] [19728] Mail will be delivered in Inbox
Mon Mar  5 04:00:02 2018: [info   ] [19728] * PostConverting processing started
Mon Mar  5 04:00:02 2018: [info   ] [19728] * PostConverting processing done
Mon Mar  5 04:00:02 2018: [info   ] [19728] * PreDelivery processing started
Mon Mar  5 04:00:02 2018: [info   ] [19728] * PreDelivery processing done

any suggestions?

coffee_is_life

Update: Just did some editing and changed the startup-action from kopano-dagent.service

previous: /usr/sbin/kopano-dagent -l
now: /usr/sbin/kopano-dagent -l -c /etc/kopano/dagent.cfg

this did the trick - no default cfg in normal startup?

coffee_is_life