I interpret the following
Apr 20 18:38:09 skapet spamd[52874]: (GREY) 117.53.153.22: <> -> <spfilter-2.sel01.mschosting.com-1745167076-testing@ehtrib.org>
As a sign there are still, er, individuals out there who think SMTP callbacks were a good idea.
Please have them read "Twenty-plus years on, SMTP callbacks are still pointless and need to die" (2017) https://nxdomain.no/~peter/twenty-plus_years_on_smtp_callbacks_are_still_pointless.html