The following Picture has been refused, because "it's either over- or under-exposed".
It has definitely a big contrast (dark water, colourde trees and the first snow), an it is really bright at the top where snow and pale sky meet. But according to my understanding and according to the histogram inLightroom it is not under- nor over-esposed.
There might be other reasons for not accepting it (esthetic/Commercial value, ...).
Please let me know, if I am wrong or if I do oversee/misunderstand something, I wand to understand how stock-photography works!