Re: [SSHGuard-users] question about postfix greylist early retry

[Christos C. <ch...@cr...>]

Greylisting allows a mail server to resend the e-mail after 5 minutes. So if a mail server retries in 4 minutes does it block it? Or it only blocks if a mail server tries to send it multiple times during the first 5 minutes?


> On 10 Jul 2018, at 18:29, Jos Chrispijn <ssh...@cl...> wrote:
> 
> On 10-7-2018 14:15, Christos Chatzaras wrote:
>> Can you explain how postfix greylist early retry works?
>> 
> What I know about it:
> 
> Normally first time connection with postgrey results in a greylisting message and time out.
> 
> But lately there are mailservers that still try every second to drop the same email (although everyone knows what greylisting is about).
> I reported this behavior to the author and he considered this as annoying behavior too, resulting in putting these kind of mailservers on the internal black list.
> 
> -- With both feed on the ground you will never make a step forward