Postgrey: Put greylisted emails to a directory instead of rejecting them totally

I'm docker-mailserver to manage my incoming and outgoing emails. One annoying thing is that some of the emails are greylisted (e.g. from amazon or digitalocean). I've already whitelisted these domains, but was thinking if there is an option to put incoming, greylisted emails into a dedicated directory on my inbox.

So instead of rejecting some emails completely it would put them into "postgrey" directory (and responding the sender that the message was rejected, as usually).

I've looked into the documentation but was unable to find such an option.