A gravatar is an image registered to an e-mail address.
You can submit yours on-line at http://www.gravatar.com.
The following variables offer control over how things are displayed.
gnus-gravatar-sizegnus-gravatar-propertiesgnus-gravatar-too-uglynil. It default to the
value of gnus-article-x-face-too-ugly (see
X-Face).If you want to see them in the From field, set:
(setq gnus-treat-from-gravatar 'head)
If you want to see them in the Cc and To fields, set:
(setq gnus-treat-mail-gravatar 'head)