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 a sender image (otherwise known as email avatar) in the emails sent from my account in a Google account and in Gravatar?

Answer

Google accounts

1. Create an account for your support addresses. You need to do this for every support address listed under Admin > Channels > Email. For more information about your support addresses, see Adding support addresses for users to submit tickets.
2. Go to the suspended tickets view in your Zendesk Support account and recover the Google Email Verification email (most likely the most recent suspended ticket).
   
3. Click the verification link.
4. Navigate to https://myaccount.google.com/ and set your icon by clicking the profile icon itself and selecting Change.
   

Before

After

Gravatar 

1. Create a Gravatar profile, if you don't have one already.
2. Check your views (and suspended tickets) to find an email from Wordpress.com, to verify your account.
3. Activate and head back to the site.
4. Upload the image, and add to your support address.
   
5. Use the Add email address link to add additional support addresses, then repeat steps 1 to 4.