[cmroanirgo]

DKIM in no way helps to get past the cartels' "reputation" filters. I send maybe one email every few months to microsoft accounts & it's always received as spam. My server setup & ip have been solid for a decade. It's only ever the globalist providers that block me. Google is 50/50 I get through. Everyone else (eg Protonmail) is no problem.

[Avamander]

It absolutely does. Also that was an "if, then potentially" sentence about reputation tracking in the future.

In your case, it's likely that your volume and sending patterns aren't consistent and trustworthy enough to keep track of your domain and IP reputation.

You have to understand that they get millions of letters from new domains each day, sent from compromised Wordpress blogs and the alike. If you want to be deliverable, you have to be consistent and not suspicious.

Or, more likely, there's some other mistake in your configuration somewhere.