Hi,
>>Suggestion to support - please run an update option and patch as soon as possible for all servers and users or an OTA update to all clients who may be affected.
Yes sir, we have rolled out an automatic update to fix the /webmail issue, so the issue will be resolved automatically on other servers as well.
For quick fix, you can execute the cron command/usr/local/emps/bin/php /usr/local/webuzo/cron.php debug=4