Rodrigo Barbosa wrote: > On Tue, Dec 06, 2005 at 10:10:17AM -0600, Rex Dieter wrote: > >>That's not greylisting. >> >>The only definition I've seen is at http://greylisting.org/ > > Oh, I see. > > I would not call that greylisting, but it is a nice idea. The explanation at above link is exactly what greylisting is. The thing you described (where confirmation from sender is needed) is not greylisting.