Override default workflow template

Create a custom version of the Standard System Mailer Workflow



Open the System: Mailer

Save it as XXSYSML

Open its wft in textpad and search and repace WFMAIL by XXSYSML

Now open this XXSYSML.wft file and change the Name of Workflow from "System: Mailer" to "XX System: Mailer"

Now you can modify the templates within this workflow as desired.





Now, go back to your PO Approval Workflow and attach a new attribute of name for FYI, #WFM_OPEN_MAIL_FYI







Make the value of this attribute point to custom version of "System: Mailer" template

Source Anilpasi