On Oct 5, 2012, at 12:41 PM, Alumno Etsii wrote: > Hi! > > I've been looking for techniques to avoid SpamBot connections to the SMTP > server (or at least to limit them or identify them easily). One of them was > the 'Delayed greeting (220) procedure', as a big number of spambots start > sending commands just after connecting, so this technique considers delaying > the 220 greeting message after connection. My questions are: > > 1) Does Postfix implements this? If so, what parameters are related to this? > (I'm trying to find something but I didn't see anything) > 2) Is this worth it? I mean, should this technique be used by default or only > under 'stressing' situations?
Here's what you're looking for: http://www.postfix.org/POSTSCREEN_README.html
