lst_ho...@kwsoft.de put forth on 12/7/2010 2:18 AM: > Zitat von Stan Hoeppner <s...@hardwarefreak.com>: > >> Noel Jones put forth on 12/6/2010 11:10 AM: >> >>> If you decide that greylisting is right for you, postgrey is a popular >>> choice -- it's flexible and reliable. >> ... >>> See google for benefits and risks of using greylisting if you're not >>> familiar with it. >> >> Interestingly, just a few days ago I decommissioned Postgrey on my MX >> along with some other A/S countermeasures. I did this after analyzing >> logs for some time. I ran Postgrey for about a year. It was stopping >> some spam at the beginning, although very little, but none for the last >> few months, and was simply slowing down some legit mail. This is not a >> reflection on Postgrey performance or reliability, but simply that my >> other A/S countermeasures are killing everything that can be killed >> before Postgrey gets a crack at it. > > How different the world is: > Postgrey (Greylisting) saved as from using RBLs with aggressive > policies, in fact we have ditched all RBLs beside some few very > carefully choosen and let Postgrey do its job. Content Filter are not a > option at all as silently loosing mail is much worse than spam.
I agree. That's but one reason why I don't use content filters. > For slowing down mail: You should have really used the auto-whitelist. > With this we get around 1% mail which is actually delayed after some time. Postgrey's auto whitelist feature is on by default. In fact, you can't disable it. If you could, Postgrey would break, as it would never find a triplet. I'm not going to delve into the reasons why greylisting sucks. We all already know them. Some of us can tolerate them, some can't. Some could for a while (me) and got fed up given the very low RIO here. Everyone's mileage varies. If you're having good results with Postgrey you should try the fqrdns.pcre file that I recommended in the thread you replied to. You'll likely see very quickly why greylisting is redundant while using that file. -- Stan
