I mean, yeah, I've been in that position, I get it for the poorly configured domains. However, if I set a DMARC policy for my domain to reject, I would expect a

I mean, yeah, I've been in that position, I get it for the poorly configured domains. However, if I set a DMARC policy for my domain to reject, I would expect at least Google and Microsoft who control something like 90% of the email market to respect that policy. The realist in me realises that there is probably a non-negative number of domains out there with dmarc set to reject but failing absolutely all spf and dkim checks, but this should be their problem, not the receiver's.