0sg.net bouncing for bad reverse lookups?

[HDTSG]

I have problems with mailbox.org as described above.

In the mailbox-forum Peer Heinlein (AFAIK: CEO) pointed to greylisting.
If spamgourmet changes its behaviour on delivery, the problem will disappear.

You can find his answer - and the full discussion - here:
https://userforum.mailbox.org/topic/647 ... ment-28930

Can spamgourmet's behavior be changed accordingly?

Regards
HD

[adb]

@HDTSG
Mailbox.org writes:
"So maybe here

Spamgourmet has rather few emails
but sends them unnecessarily/wrongly from many different source IP addresses (instead of always using the same one) - this is tactically unwise and stupid and therefore a problem of its own making
and/or has very long retry times, which is also tactically unwise and stupid and therefore a home-made problem"

Can anything be done here by spamgourmet to fix that?