Email - Open (Tracking)

> Marketing > Email (Internet Message)

1 - About

Opening an email is an user action that shows engagement.

Advertising

3 - Track

The you can be tracked with a get pixel.

Ie when the email loads images, a HTTP get request is performed, sending a piece of information.

More see:

4 - Note

4.1 - Referers

HTTP - Referer (Referrer) are unreliable for tracking because as the email clients may use link redirectors that will mask the source of the email, the referer will appear to come from the email provider and not the email.

5 - Documentation / Reference