How to send non Doc1gen generated files in email through EngageOne Digital Delivery.

EngageOne Digital Delivery expects DIJ file in predefined structure. DIJ with this structure is created by EngageOne Generate (formerly Doc1 generate).
However, files not generated from EngageOne Generate, can be sent in an email using EngageOne Digital Delivery RestAPI. For more information on rest API, refer section 'REST Web Service APIs' in Reference Guide which is part of product documentation.
UPDATED:  November 29, 2017