A gravatar is an image registered to an e-mail address.
You can submit yours on-line at https://en.gravatar.com/.
The following variables offer control over how things are displayed.
The size in pixels of gravatars. Gravatars are always square, so one
number for the size is enough. If
nil, this defaults to the
List of image properties applied to Gravatar images (see Image Descriptors in The Emacs Lisp Reference Manual).
Regexp that matches mail addresses or names of people whose avatars
should not be displayed, or
nil to display all avatars. It
defaults to the value of
If you want to see gravatars 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)