SAP: Email Functionality in SAP with a Custom Function Module

A custom ABAP function module, ZFM_SEND_EMAIL, sends mail through Business Communication Services' CL_BCS and CL_DOCUMENT_BCS classes, adding TO/CC/BCC recipients and multiple attachments by building the HTML document in application code on top of what CL_BCS delivers, which is how ABAP's notificationsNotificationscapabilityTelling a person something happened when they are not looking at the screen — a notification in the launchpad, an email, a message somewhere they already are.SAP and community, narrow by design capability describes mail going out. The send sits in a TRY structure whose three CATCH blocks for CL_BCS's class-based exceptions are empty, so what reaches the caller is a BAPIRET2 table that BAPI_MESSAGE_GETDETAIL fills on the paths without an exception: no recipients given, sent to all, or not sent. That conversion into a caller-facing message table is what ABAP's error handlingError handlingcapabilityTurning a failure into a response a client can act on — protocol-correct error payloads, correlation, and a boundary between internal detail and what a caller sees.SAP and community, unassessed capability leaves to the application.