Gmail now offers "dynamic emails" that let you do things without leaving your email inbox. These use AMP, as do many mobile websites. If you prefer to stick to traditional non-dynamic emails, do the following to disable this new feature.
To disable dynamic email, open the Gmail Web site on your computer, click the gear, and choose Settings.
In the list of settings, on the General tab, look for "Dynamic E-mail." Deactivate the option "Activate dynamic e-mail".
Note : Dynamic emails are also disabled if you select "Ask before viewing external images" to the right of "Images".
Scroll to the bottom of the page and click "Save Changes" to save your changes.
Gmail no longer loads dynamic emails. If an email is dynamic, the classic version will show instead, just like when using a non-Gmail email client.
Dynamic emails were available to all on July 2, 2019. If you're a G Suite administrator, you can completely disable them for your domain by going to Apps> G Suite> Gmail Settings> User Preferences and selecting "Disable" for everyone.