No, there are no trusted senders or whitelisted domains/IP addresses.
The header shows that SmarterMail is performing its checks:
X-SmarterMail-Spam: SPF [None]: 10, DMARC [failed]: 0, Reverse DNS Lookup [ReverseFailed]: 10, Null Sender: 0, HONEYPOT [passed]: 0, SEM - Black: 0, Hostkarma: 0, SURBL Combined: 0, SpamRats All: 0, UCEProtect Level 1: 4, Truncate: 5, Surriel: 0, IADB: 0, IMP-SPAM: 0, UCEProtect Level 2: 5, Backscatter: 0, SEM - Backscatter: 0, Barracuda: 0, DCC: 0, MSRBL: 0, UBL: 0
The spamchecks.log also contains the line that tells you what is being done:
Found 22 spam checks to run: Reverse Dns Lookup, Null Sender, _HONEYPOT, RemoteRspamd, ....
I don't see anything unusual. I can't say whether the mail is even being delivered to the Rspamd server.
The delivery.log file displays the spam check results, but without the Rspamd results. It should say something like this: "[_REMOTERSPAMD: 79:135]".
Thanks!