Automated emails for requests should be stopped

Hello @manjula, here is a section of a Knowledge Base article that outlines how to turn the automated emails off (section titled Turning On and Off Notifications): 

The email notifications are sent by object and you can deselect each object you do not want an email notification sent for, including assessments, requests, and tasks. You can also choose to send one summary email per week on a selected day. 

Please note, changing these settings will affect all users and cannot be done per individual.