Hi, On Wed, 7 Jul 2004 20:04:27 -0600 (MDT) "Lucas Albers" <[EMAIL PROTECTED]> wrote:
> Some items to be aware of: > Some mail servers take 4xx codes as permanent failure codes if given > before the data phase. > > Some mail servers take any 4xx code as a 5xx permanent error code. One can make a very convincing argument that these servers are already broken since they will lose mail under normal circumstances, not just under the special case of tempfailing/greylisting. There will always be some excuse for why junk like that absolutely must be kept on the internet and why others absolutely need to communicate with it. > Their is a list of domains that can be whitelisted for this. > Can't find it right now. Check the greylist archives at http://lists.puremagic.com/pipermail/greylist-users/ Thankfully there are very few systems that are so broken. Another problem is caused by large mail farms which may retry delivery from different machines (Yahoo.) Again, there's a short list of those, probably referred to in the Greylist archives. > I've been using it on the last zillion messages and it has worked perfectly. > You can set it low rejection time at 2-3 minutes to get 90% of the > positive effect. Or better yet, set it in read-only mode for a week before deploying it (e.g. prepopulate the database with sender/recipient/IP triplets.) Most of your normal traffic will have been prelearned and there will be no delay. hth, -- Bob
