> I think Windows uses alternate data streams to mark files as coming from the web, if the web server is Unix it can't, and will not do such a thing. Doesn't t

> I think Windows uses alternate data streams to mark files as coming from the web, if the web server is Unix it can't, and will not do such a thing. Doesn't that depend on the e-mail client / browser rather than the server? The client will mark the file as downloaded from the internet when downloading it. The data in the HTTP protocol is not altered.