You can use the Simple Email Note to make note for an individual email
1. Features
The addon enhances user functionality as the following:
Add a note for an individual email in Gmail
Update note
Search note by note’s description and show all emails match the search criteria 2. Privacy Policy
Please click this link Privacy Policy to read the Privacy Policy of Simple Email Note addon 3. Google API Disclosure
Please click this link Google API Disclosure to read the Google API Disclosure of Simple Email Note addon