I like running my own mail server but I don't want to waste time on filtering spam so mismatches with ptr and hostname are an instant rejection from me. A PTR

I like running my own mail server but I don't want to waste time on filtering spam so mismatches with ptr and hostname are an instant rejection from me. A PTR match is a very strong signal that I am looking at a hosted server or business connection which is configured to send email and not a compromised windows PC on consumer dsl which used to be a huge problem. ISPs supply those dsl ranges to blocklists as well. When I first started hosting my own mail it was on an old repurposed linux PC on ISDN in the early 2000s and even then my ISP offered configurable PTR records along with static IP in a small business package. I moved my family email vps to a different region recently and it took me a few seconds to update the ptr records for ipv4 and ipv6. It seems a very low bar for such a strong signal that you are dealing with a mail server and not some random compromised machine.