Send mail when SCP Workflow Fails

Hello Experts,

We have a requirement to send a mail to initiator on both success and failure of SCP Workflow.

For Example:

I am updating data back to S4 System, by Calling oData Service from Workflow Service task,

if update fails, i need to capture the error message and send mail to initiator

if update successful, i need to send Congratulations mail to initiator.

When ever there is an error in updating, Workflow Service Task is failed, and Workflow enters Erroneous State, and i am not able to send mail.

Can you please, help me, how to handle this

Thanks and Regards

Hari Krishna