I'm not Substack but "email ops" is a thing that exists, where you have someone working on reputation, getting you off blackhole lists, keep up with the latest

I'm not Substack but "email ops" is a thing that exists, where you have someone working on reputation, getting you off blackhole lists, keep up with the latest DKIM-like thing to ensure deliverability, etc. For very large email senders it, yes, may include knowing whose phone number to call.