Each user (with and without administrator permissions) can change the default global settings of Email Notifications Digest plug-in to be applied to his account only.
To configure personal settings click on user profile icon in JIRA and select Digest Email from menu:
→ The system will navigate you to Email Notifications Digest - Personal Configuration page:
If notification digest is enabled for a user but no hours are selected in a week to receive digest, the issue changes will not be collected and no digest will be sent to user's email address.
The settings are the same as in Global Digest Configuration
Personal Configuration settings override global digest settings for a specific user they are specified.
The only exception is Enable Digest Email setting: if an admin switches off digest emails, users will not be able to switch it on in their personal configuration settings.