Quoth Clemens <clemens.zeidler@xxxxxxxxxxxxxx>, > - client would be the mail app. > - cat would just dump what is already there; the header or the complete > message. > > Think that is no to bad, in this way you can just look at the header first > and decide to download the message or not e.g. using a spam filter. See, to me, a filesystem is a way that you can do everything with cat. If we already have a mail daemon, and we are going to need a mail app anyway to make anything happen with special ioctls, we might as well use BFS and just assign a mail application to manage the files in the way you describe, with a scripting interface for any external applications that might want to be involved. Not much extra value added by making it a special filesystem. Donn