I have this server I administer. I have some users that have email accounts on that server and use stuff like horde to read their emails on that server. The server have a limited space and these users are relapse and never empty their trashes or remove unnecessary stuff from their accounts and the server are always getting full of crap.
Running the server periodically I see that mailboxes like
/mail/myserver.com/theirAccounts are never emptied. I have no terminal access to that server, just FTP. My idea was to put directories like these with
chmod 000, so their web mailers or even the system will unable to store stuff on their trash or on spam folders, discarding them automatically.
Can I do that without risking crashing the system? What more can I do to prevent stuff from accumulating on those directories. Again I remember that I do not have
ssh to that server, so I cannot install
cron or anything to empty these directories periodically.