How to change the Email sender name for Email Notifications ?

1. Navigate to Administration>  System > System Settings OR System > System Settings 
2. In General tab, scroll down to Other section
3. Modify the Email sender name (Distribution list by default)
4. Save

This is email address from which emailed notifications and reports will be sent. Changing this email address may cause new emails to be tagged as junk or spam if the new address is not marked as safe.