There are a few address where I need to forward to gmail / yahoo / outlook etc. If I understand correctly, there's some amount of spam where 1) rspamd does the "add header" action, and then 2) it gets forwarded. I'm worried this will hurt my reputation with the big providers.
Would it be possible, on an individual basis, to say "instead of adding a header, quarantine"? Perhaps with a Sieve filter? It is easy for me to go through the quarantine from time to time and deal with it. The emails I'm talking about have score like maybe above 4.