Am 23.08.2011 21:33, schrieb Patrick Ben Koetter: > * Wietse Venema <postfix-users@postfix.org>: >> Stan Hoeppner: >>> On 8/23/2011 9:10 AM, Kov?cs J?nos wrote: >>>> Thanks Ralf! It's amazing how much spam the pregreet test and a good RBL >>>> can catch. >>>> Do you have any data on how many spam emails survived postscreen? >>> >>> Overall, Postscreen is no better nor worse at stopping spam than what >>> we've all been doing via SMTPD for many years. It simply decreases the >>> number of SMTPD processes required to do so, hence decreasing server >>> load and allowing more processing of legitimate mail. >>> >>> Postscreen is no magic bullet, it's overall "catch rate" being little >>> different than setups without Postscreen. >> >> Agreed. Postscreen's main goal is to reduce mail server load, so >> that you can postpone that forklift upgrade. >> >> Postscreen also stops a few percent of spambots that popular DNSBLs >> miss, but at this time, that is only a minor benefit. > > I tend to believe (speculation, not measurement) I can get rid of greylisting, > which I dislike because it slows down first mail contact, if I use postscreen. > Not because postscreen does the same job, but because it seems to keep the > same miscreants away. > > IIRC I've seen a few discussions on this list that seemed to discuss the topic > greylisting vs. postscreen, but I didn't have the time to read and follow > them. > > I disabled greylisting since I started using postscreen and the spam ratio did > not increase, but the immediacy at which mails from new senders arrive did.
i see less greylisting since postscreen setup i only used greylisting selective ever, so i see no real reason for disabling greylisting by enable postscreen, the features are playing good together if configured right, i have disabled fail2ban since postscreen, looks like its better to send a reject via postscreen at once, then blocking bots, but this may be very special to my hot botted domain > > Anyone with similiar observations? > > p@rick > -- Best Regards MfG Robert Schetterer Germany/Munich/Bavaria
