Akismet hid my post temporarily, heh heh. I’ll just put my edit in a new post:
I’m out of my depth at this point but I’m assuming that Transmissions API is all SparkPost specific stuff and Discourse’s email sending uses something generic… doesn’t detect and do different things for different mailing providers… though I’ve no idea.
Amusing that in their own infographic “Password resets” are the first thing they list for transactional emails. Safe to say they’d have detected that if their system worked that way… the “mark as transactional” thing must just be specific to their outgoing API… darn them. Oh well I’ll live with it. 
