If you look at Postmarks website, they explicitly disallow the service you are promoting. Marketing emails are not allowed to be sent through Postmark. https:/

If you look at Postmarks website, they explicitly disallow the service you are promoting. Marketing emails are not allowed to be sent through Postmark. https://postmarkapp.com/transactional-email https://postmarkapp.com/transactional-email This entire link describes their definition of transactional email.