Howto: Create a Gravatar brand icon

Recently I talked about how to make your brand image icon show up when sending to Gmail recipients. Today I'll talk about how to do the same for a different set of smaller ISPs and email clients.

Gravatar is a system owned by the folks behind Wordpress that allows you to upload an image or photo that is then linked to an email address. The primary use of the system is to show user icons for commenters on Wordpress blogs, from what I can tell.