> From: "John Hardin" <jhar...@impsec.org> > I fully agree. When I purchase an air-line ticket, I want the mail > immediately in my inbox. > > If the greylisting software replies a "4xx Please come back in 299 > seconds", > the truth is that you will have to wait an undetermined amount of time, > depending on the sending server setup, and not at all under your control. > Very frustrating.
I use a blend of greylisting and spamassassin, so that only mails which are close to the margin by SA score get greylisted; lower-scoring mails are accepted immediately, and high-scoring mails are rejected outright. It works pretty well. I've never had any complaints about delivery speed, but some senders have broken mail servers that don't retry on receiving a temporary failure. Greylisting.org maintains an incomplete list of such servers: http://www.greylisting.org/whitelisting.shtml --Ian
