Tue Jun 14 19:16:04 CEST 2011

emasc mail-mode vs. message mode

This warning showed up:

  Warning (mail): The default mail mode is now Message mode.
  You have the following Mail mode variable customized:


  To use Mail mode, set `mail-user-agent' to sendmail-user-agent.
  To disable this warning, set `compose-mail-user-agent-warnings' to nil.

What's the difference between mail-mode and message-mode?  From[1]:

  Message mode handles MIME attachments. This is the main benefit over
  the default mail mode.

[1] http://www.emacswiki.org/emacs/MessageMode