Some tools allow you to add a small "Tracked by..." signature, which keeps your communication transparent.

When using an email tracker, it is important to stay compliant with privacy laws like GDPR or CCPA.

However, the Yahoo mobile app has recently integrated some features via Yahoo Plus Protect and business-oriented updates, offering insights into suspicious activity. Yet, for granular tracking (knowing if a specific person opened a specific email), you must look outside the Yahoo ecosystem.

Know exactly which links or attachments were clicked.

The feature works both ways. If you want to avoid being tracked by others, Yahoo offers a strong defense.