To resolve this issue, complete the AMP for Email: Sender Registration form to allowlist your supported email client to send AMP emails. This is also available in the Gmail for Developers > AMP for Email documentation for how to Register with Google to send dynamic emails. Once you receive confirmation, you should be able to perform sends using the email address requested in the form as the email's From Address.
000389142

We use three kinds of cookies on our websites: required, functional, and advertising. You can choose whether functional and advertising cookies apply. Click on the different cookie categories to find out more about each category and to change the default settings.
Privacy Statement
Required cookies are necessary for basic website functionality. Some examples include: session cookies needed to transmit the website, authentication cookies, and security cookies.
Functional cookies enhance functions, performance, and services on the website. Some examples include: cookies used to analyze site traffic, cookies used for market research, and cookies used to display advertising that is not directed to a particular individual.
Advertising cookies track activity across websites in order to understand a viewer’s interests, and direct them specific marketing. Some examples include: cookies used for remarketing, or interest-based advertising.