High-risk delivery pool for outbound messages

I have found out how I can see if SCL was given upon outgoing filtering, we see that in header part "x-forefront-antispam-report-untrusted", while the incoming filtering is reported on "x-forefront-antispam-report" (without untrusted suffix).

This one was useful: https://c7solutions.com/2013/10/what-is-x-forefront-antispam-report-untrusted

Thou, still looking for more signs in the header which would tell me if message was sent through high risk pool.