[adhesive_wombat]

If people dislike receiving that email so much that they report it as spam, it's spam.

Maybe if enough scummy companies have to mess about getting de-blacklisted, they might reevaluate whether their emails serve their customers, themselves, or, more likely, neither the company nor the customer but rather someone in between who is using some artificial metric (maybe "clients reached", "tracking pixels delivered", whatever) to angle for a pay rise.