Free email open tracking

Here are some free email open tracking tools:

1. OpenTrack: A simple and free email open tracking tool that provides detailed reports on email opens, clicks, and bounces.
2. TrackMyEmails: A free email tracking tool that provides real-time updates on email opens, clicks, and bounces. It also offers a free trial for paid features.
3. EmailTracker: A free email tracking tool that provides detailed reports on email opens, clicks, and bounces. It also offers a free trial for paid features.
4. OpenRate: A free email tracking tool that provides real-time updates on email opens, clicks, and bounces. It also offers a free trial for paid features.
5. BriteVerify: A free email tracking tool that provides real-time updates on email opens, clicks, and bounces. It also offers a free trial for paid features.
6. MailTrack: A free email tracking tool that provides real-time updates on email opens, clicks, and bounces. It also offers a free trial for paid features.
7. TrackEmail: A free email tracking tool that provides detailed reports on email opens, clicks, and bounces. It also offers a free trial for paid features.
8. EmailOpenTracker: A free email tracking tool that provides real-time updates on email opens, clicks, and bounces. It also offers a free trial for paid features.

Please note that some of these tools may have limitations on the number of emails you can track for free, and may require you to upgrade to a paid plan for more advanced features or larger email lists.

It's also important to note that some email providers, such as Gmail, may block or flag emails that contain tracking pixels or other forms of tracking. Be sure to check your email provider's policies before using any email tracking tool.