Hello.
You can send an e-mail from the stock/requirement list (MD04) or the Material Requirements Planning (MRP) list (MD05).
By creating workflow in SPRO -->Production--> MRP-->Evaluation-->Activate workflow for mail to MRP controller
For in OMD0 for your MRP controller you have to define the
Recipient type and Recipient
In SWDD define the trigger events in transaction SWETYPV and look up business object relevant for you.
Refer this useful SAP help document,
Workflow for Mail to MRP Controller - Evaluating the Planning Run (PP-MRP-PE) - SAP Library
Best Regards,
R.Brahmankar








