Gnus also understands some non-MIME attachments, such as
postscript, uuencode, binhex, yenc, shar, forward, gnatsweb, pgp,
diff. Each of these features can be disabled by add an item into
mm-uu-configure-list. For example,
(require 'mm-uu)
(add-to-list 'mm-uu-configure-list '(pgp-signed . disabled))
postscriptuubinhexyencsharforwardgnatswebpgp-signedpgp-encryptedpgp-keyemacs-sourcesmm-uu-emacs-sources-regexp.
diffmm-uu-diff-groups-regexp.
verbatim-marksLaTeXmm-uu-tex-groups-regexp.
Some inlined non-MIME attachments are displayed using the face
mm-uu-extract. By default, no MIME button for these
parts is displayed. You can force displaying a button using K b
(gnus-summary-display-buttonized) or add text/x-verbatim
to gnus-buttonized-mime-types, See MIME Commands.