There is a default messaging option specifically for essays in the lesson activity. Check with your system Admin to see if it is turned on/allowed.
Lesson
Email notifications regarding essay questions
ການສົນທະນາຖືກລັອກ ດັ່ງນັ້ນ ທ່ານບໍ່ມາສາດຕອບກັບມັນ.