The default RPMforge repository does not replace any CentOS base packages. In the past it used to, but those packages are now in a separate repository (rpmforge-extras) which is disabled by default.
Follow this commands
If you have a hosting account at Hetzner with free backup space, you can not access this backup volume using rsync.
If you have a FTP backup space for your vserver or dedicated server, tartarus is a great tool to create and crypt your backups.
If you want to change the webmail cache type follow this steps.
To prevent your users from sending mass e-mail, do the following: