Hi. Last email traffic is from sep 2019 on master in mail_traffic, when i upgraded from Debian 9 to 10. No data in slave in mail_traffic. Cron seems to run, i get other traffic (web) and email quota works. Database, both master and slave checked. php cron-debug shows only : finished. No errors in obvious logs. I always reconfigure all services when updating ispconfig. According to 100-mailbox.stats.inc.php there is some files ispconfig_mailsize that dont exist in maildir, should it ? Is it Dovecot that creates this file or ispconfig ? What to look for when stats is missing ? Does the traffic store in slave database and then transfered to master database or how is it collected? (i did delete the .state file, since that gave me problems 2 years ago, but did not help now) Debug log gives this: DEBUG - safe_exec cmd: which 'dovecot' 2> /dev/null - return code: 0, but nothing else that looks like errors.