Two main modules are Postman_IS and Postman_CS. The Postman (End User) module contains demo screens. The user of this asset should get familiar with the Postman API service first by reading the extensive guide that is available on https://postman.gov.sg/.
Postman_CS contains an entity to store the logs of emails sent using the Postman API. In view of storage space, the body of the email is not stored in this entity. If there is a business need, it can be added in this module. This module is also where the Postman API Token can be configured. CustomEmail Site Properties is used in this module to populate the "from" field of the API. If APIM or a proxy is in use, the URL can be changed too. In this case, there might be a need to add additional headers which is not implemented in this asset.
Postman_IS implements the HTTP POST method with the request body in multipart/form-data format which is the main requirement of Postman Progmatic Email API if we want to add attachments. It also contains HTTP GET implementation. The implementation is generic and is not coupled with Postman API Service.