Retribution's tooltip text states:

However, this effect is not occuring for all damage dealt. Damage dealt over time does not proc retribution, it only applies to damage dealt via attacks. Meaning, it will deal damage when you are hit with chain lightning or god's whip, but not for the shock debuff afterwards. It also does not react to poisons, bleeds, burns, etc. Can we clarify with XL if this is intentional, and thus the tooltip should be changed to "For 10sec, whenever you receive an attack, ..." instead of "receive damage"? Or if it is not intentional, if XL can change it?