Which one is correct "delivered to" or "delivered at"?
Should I say Food delivered to your doorsteps or Food delivered at your doorsteps?
Solution 1:
Delivered to is the more correct usage.
If you are saying "to" suggesting where the food traveled, e.g. "It traveled from A to B", then the food is delivered to B.
If you are saying "to" suggesting the recipient, e.g. "It was given to A. Citizen", then the food is delivered to A. Citizen.
Delivered at may be technically correct but sounds wrong in the context you provided. You would say "delivered at" when speaking in the broader sense of when/where the delivery took place rather than the specifics of the delivery itself, e.g. "The food will be delivered at midday", "The food was delivered at the festival".