See it work
One Harihar cotton order, message by message
A garment unit asks a Harihar ginning mill for the day's cotton rate on Monday morning. Scrub through the week to see which messages are replies, which are utility templates and the one that is marketing.
Two of the six messages are templates the mill sends first about an order the buyer placed, so they are utility at ₹0.19. The rate, the confirmation and the lorry answer are replies at ₹0.145. Only the season's offer is marketing, at ₹0.94, and only to buyers who agreed to receive it.
The 24-hour service window explains why Thursday's answer needed no template although Wednesday's note did.