When you sign up for DuckDuckGo Email Protection, you get to pick a personal Duck Address (example: name@duck.com). Any emails sent there will be stripped of email trackers on our block list and then forwarded to whatever personal forwarding email address you provide, arriving at your regular inbox. Within forwarded emails, you will see a banner from DuckDuckGo that highlights how many trackers were blocked and what companies appear to be behind them.
Prior versions on GitHub.