Why does D2S use a server-based filter?
There are some very compelling reasons for this: a zero storage footprint on your PC (no software is installed); no software upgrades are ever needed (there’s nothing to download); you’re always using the latest version of the filtering software; you have access to a globally-pooled spam and virus database (incredible accuracy); 100% cross-platform compatibility (works on any PC, Mac, WebTV, etc); and a web-based client interface means you can easily access your account from any PC, anywhere.