[CentOS] Re: Planning Mail Server (with low resources)

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.