# Open and Click Tracking

### Open and Click Tracking <a href="#open-and-click-tracking" id="open-and-click-tracking"></a>

Open and click tracking is disabled by default for all domains. You can enable it by clicking on the toggles within the domain settings.

For best deliverability, we recommend disabling click and open tracking [for sensitive transactional emails](https://resend.com/docs/dashboard/emails/deliverability-insights#disable-click-tracking).

### [​](https://resend.com/docs/dashboard/domains/introduction#how-open-tracking-works)How Open Tracking Works <a href="#how-open-tracking-works" id="how-open-tracking-works"></a>

A 1x1 pixel transparent GIF image is inserted in each email and includes a unique reference to this image file. When the image is downloaded, Resend can tell exactly which message was opened and by whom.

### [​](https://resend.com/docs/dashboard/domains/introduction#how-click-tracking-works)How Click Tracking Works <a href="#how-click-tracking-works" id="how-click-tracking-works"></a>

To track clicks, Resend modifies each link in the body of the HTML email. When recipients open a link, they are sent to a Resend server, and are immediately redirected to the URL destination.


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