It seems to be that AWS SES is cheaper and more flexible, but Postmark is essentially charging for giving you the typical use-cases and handling some of the problems almost-out-of-the-box?

For instance, while configuring AWS SES, I had to read through many documentation pages about DMARC, DKIM, SPF, Outlook protection, SMTP configuration, and Email+DNS (for Cloudflare).

Is my understanding correct that Postmark is just all of this low-level details as a service where you pay for an extra premium and support.

I assume you still would have to configure some infrastructure, but it'd mainly be things that they can't do themselves like setting up DNS records.

Some people claim that they got over 10% in open rates, but I wonder if that's because of some nice content analysis they do and some best practices around email protocols that go over my head, or if it's just the typical SPF+DKIM+DMARC issue.