OOB log messages don't contain the meta and headers

and no errors in the output of journalctl -u kumomta

is log_oob enabled for the domain of the recipient?

Oh, right. Side effect of implementing the VERP, it’s enabled for kumo.taskulu.com, not for psrp.kumo.taskulu.com.

Everything is working perfectly, Thanks again @free-spirited-yorksh @yearning-hyena