Hi Santosh
You need to configure your notification settings in the MSMP configuration workflows as follows
Mr X to get email on request submittion - In Step 1 (Process Global Setting) - Add GRAC_USER as the receipient ID for Request Submittion notification event.
SKTEST manager approver email - In Step 5 - Maintain Paths - Add GRAC_MANAGER_NOTIFICATION as the receipient ID for the New Work Item notification event.
Thanks
Anthony