You could create a menu to permit a recipient to opt out of certain types of messages, but you have to include the option to stop all industrial messages from you.
You nwere ike ịmepụta menu iji nye onye nnata ohere ịpụ na ụdị ozi ụfọdụ, mana ị ga-etinyerịrị nhọrọ iji kwụsị ozi azụmahịa niile n'aka gị.