[Zhah001]

I guess that it was more likely a problem with the mail service, something went wrong and the restart sorted the problem. Maybe just restarting the mail service would have fixed it too. That would be a quicker way to bring the service up again, instead of rebooting the whole machine.

[Seedbox Paradis]

Yes, they can be setup using Webmin's control panel, see:

http://doxfer.com/Webmin/ScheduledCommands

[mariusz123]

is it possible to set cron jobs on RPS I with Release 2 RPS?