[AusNOG] Greylisting in an ISP / Hosting Environment

[Andy Davidson]

On 27 Apr 2009, at 02:33, Shaun Ewing wrote:

> My advice is that if you deploy greylisting, then you need to have  
> at least
> one MX that does not use it.

If you do this, then it means that the positive effects of greylisting  
are removed, because there's a way in for spammers that does not get  
slowed down.

I use exim and only greylist borderline spam.  This way I get most of  
my legitimate email straight away and only spam suspects get slowed  
down.

Thanks
Andy