Should say that on the flip side, I think my sending hits spam filters too, because I’ll send w/o replies. Depends on whatever “features” the mail provider’s got enabled (and maybe you can’t disable).
(Basically, I co-run the family mail server, so that’s why I know I don’t have spam filters. But it also leads to gmail or other providers liking to mark us “spam” because we didn’t pay the latest “please we’re not spam” extortion racket.)