On 31 Jul 2016, at 22:12, Benny Pedersen <m...@junc.eu> wrote: > On 2016-08-01 05:55, @lbutlr wrote: >> On 31 Jul 2016, at 01:06, Robert Schetterer <r...@sys4.de> wrote: >>> But thats historic, bots are recoded, better antibot tecs were invented. >>> The only problem now is people still believe in historic stuff. >> Yeah, that about sums it up. Greylisting never worked well, always >> caused problems with lost email, and in 2016 is simply a bad idea. Not >> just a not good idea, but a bad idea. > > back to basic then, why would a mta like postfix not deliver later when it > get a tempfail ?
Where did you get the idea that postfix will not deliver later? > i bet greylist is cough invalid mailservers at the doorstep, it could be that > postscreen is bad aswell ? Sure, if by “invalid” you mean Amazon, most banks, several airlines, large mail services, and many many others. Nearly any company with multiple mail servers will send mail from any of their servers, and may retry from a different server than the initial attempt, thus resetting the greylist. There is a reason that greylist software comes with default exclusions, because greylisting is known to cause missed email if used as designed.
