[GLLUG] Postgrey holding list

Henrik Morsing henrik at morsing.cc
Tue Mar 3 15:19:38 UTC 2020

On Tue, Mar 03, 2020 at 02:48:48PM +0000, John Edwards via GLLUG wrote:
>On Tue, Mar 03, 2020 at 02:31:20PM +0000, Henrik Morsing via GLLUG wrote:
>> On Tue, Mar 03, 2020 at 02:28:55PM +0000, Marco van Beek wrote:
>>> When it connects again it just does the maths and if it is more than 300 seconds it lets it through.
>> Since what? If it's stateless, what will it compare the 300 seconds to?
>Database files in /var/lib/postgrey/ (at least on Debian/Ubuntu).

Yes, as I have said all along. My problem is the strings and numbers in there make no immediate sense, hence why I have now turned to reading the Perl code as there is apparently no ready-made tool for outputting the database.

>I think the main problem will probably be that postgrey does not
>record anything unique such as the email's message ID, but only the
>sender, recipient, and IP address of the sending mail server.

Which is all I want to know.

>So you could see an email from Alice to Bob that has been greylisted,
>and then maybe 30 minutes later an email from Alice to Bob that passes.
>But you can't be sure that is the same email, or just a second one that
>has been sent later.

As long as it gets through, I'm happy.

Henrik Morsing

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