Comment by calvinmorrison

Having worked at a provider, that is not the psychology at all. The #1 priority is to keep the mail flowing. #2 incremental improvements to security, spam, reputation is a distant second. The other thing is, providers already know and have people who work on email standards, work in the ecosystem, etc. So once you're inside, with people who know whats going on, know the tools, know how things work intuitively without having to read a manual, theres less desire to change.