Yes! You can look at the original source of the email.
Open the email in Gmail, click the three-dot menu in the top right, click "show original". A new tab will open with the raw email including all the headers.
Open the email in Gmail, click the three-dot menu in the top right, click "show original". A new tab will open with the raw email including all the headers.
You can work against this by disabling images, or you can add a tracker list I made to your adblocker!