From Lunarpages Web Hosting Wiki
File System Security
How are you implementing file system security with the .NET filsystem object? Is each site completely sandboxed?
Yes, Plesk implements a sandboxing method for security between filesystems.
Support web.config / global.asa / global.asax?
We support web.config files in Plesk.
Each site runs in its own application pool. Plesk control panel handles this for us.
What is SmaterMail?
SmarterMail is an exciting new Webmail based program we currently have setup on one of our Windows servers. If you would like to read up more on SmarterMail 4.x, please visit their official website at http://smartertools.com which will provide you with more details.