This article covers
How to check which email notification is using the specific 'from' address via the DB?
Solution
First, use the from_profiles table to obtain the 'from' or sender profiles configured under the specific Chargebee site.
Once you obtain the sender profile external ID, you can go to the notifications table to search using the specific sender profile which would give you the notifications that are currently using it. This helps to narrow down the search for us and the merchant as well.
Related articles and Documentation
Why can’t I remove an email ID from Sender profiles in Chargebee?