Hi, I have a 2 month old Debian Wheezy mail server running Courier, ISPconfig 184.108.40.206 and Roundcube 0.9.5 The issue I'm having is in quotas. Yesterday one of the mail clients exceeded their quota so I doubled their mailbox size (500MB to 1000MB) and everything started to work again. Then from 00:40 the log shows them having quota errors again with the following error: Mar 12 00:40:55 srv5 postfix/pipe: A83CF362: to=<email@example.com>, relay=maildrop, delay=0.11, delays=0.05/0.01/0/0.05, dsn=4.3.0, status=deferred (temporary failure. Command output: maildrop: maildir over quota. ) Looking at the physical mailbox size it was about 575MB and ISPconfig was confirming this but logging onto roundcube webmail showed the mailbox being 100%. After changing the quota again to 1005MB everything then started working again, as it did yesterday, and roundcube changed to 51%. I assume the issue came in during the running of cron_daily which happens at 00:30 if I'm reading crontab correctly. Looking in the syslog and ispconfig/cron.log the only issue from the day before was: Tue Mar 11 00:30:01 GMT 2014 PHP Notice: Undefined index: admin_mail in /usr/local/ispconfig/server/cron_daily.php on line 1031 Tue Mar 11 00:30:01 GMT 2014 PHP Notice: Undefined index: admin_mail in /usr/local/ispconfig/server/cron_daily.php on line 1039 We believe we fixed this yesterday, before the issue, by putting an email address in the ISPConfig - System Config - Mail - Administrators email, we simply used Postmater@xyz.com (ie one of the locally hosted accounts). After this we had no other messages. Any help would be appreciated.