I am trying to annotate our promotional email - I want to have the image and the voucher code in the preview. I pasted the code as per your instructions here https://developers.google.com/gmail/promotab/overview and on the preview it looks as we want to have it. However, when I send the email to myself from our ESP (Dotdigital) it shows as any other email - there is no image showing and no voucher code in the preview. Here is the chunk of html we added to our template in order to annotate. Could you please help us?
Tried multiple test send outs, checked my account settings, created an email address xxxxxxpromotabtesting@gmail.com and tried to send the email there. Nothing worked.
I would like to see the image and discount preview before I actually open the promotional email, however it only shows as a normal email without annotations.