How can I add a sender avatar in my emails?

Question

I want to retain my customer's attention on an email. How can I add an email avatar in the emails sent from my account in a Google account?

Create an account for your support addresses. You need to do this for every support address listed in your account. For more information about your support addresses, see the article: Adding support addresses for users to submit tickets.
Go to the suspended tickets view in your account and recover the Google Email Verification email. This email is most likely the most recent email in the suspended ticket view.
Click the verification link.
Navigate to https://myaccount.google.com/ and set your icon by clicking the profile icon itself and selecting Change.

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