Check for the presence of /etc/logrotate.d/zimbra and see what it contains?
The section for zimbra.log should be:
Code:
/var/log/zimbra.log {
daily
missingok
notifempty
create 0644 zimbra zimbra
postrotate
killall -HUP syslogd 2> /dev/null || true
kill -HUP `cat /opt/zimbra/log/swatch.pid 2> /dev/null` 2> /dev/null || true
kill -HUP `cat /opt/zimbra/log/logswatch.pid 2> /dev/null` 2> /dev/null || true
endscript
compress
}