Take control of your inbox by unsubscribing from emails you never have time to read, or have lost interest in. … I opted to use Google Sheets as a centralized place to store emails and their unsubscribe links to make it as user-friendly as possible. This also provided the added benefit of working with Google Apps Script to extract email metadata from Gmail to Google Sheets.

Interesting little Apps Script project for those interested in tidying up your inbox and also an opportunity to try a bit of python. Alternatively you might want to have a go at modifying this solution to also extract unsubscribe links with Google Apps Script

Source: Extract Unsubscribe Links from Emails using Apps Script and Python