Is emotional harm intentional or reckless or both?

Both. Some people intentionally abuse people emotionally, many times because it gives them a feeling of power and control. Some people unintentionally abuse others emotionally- such as a man who constantly tells his wife not to wear certain things because it doesn't look good: he may think that by not calling her fat he is not being emotionally abusive, but how she interprets it could be just that. Same with a parent constantly telling a child they are bad- eventually that child will believe that they are bad and start acting how their parents portray them. The parent could possibly have no intention of this harming their child.