(Encoding Customization): Add a note to the

 mm-content-transfer-encoding-defaults entry.

diff --git a/texi/emacs-mime.texi b/texi/emacs-mime.texi
index 410dfb2..cc69613 100644 (file)
--- a/texi/emacs-mime.texi
+++ b/texi/emacs-mime.texi
@@ -852,8 +852,14 @@ used except, e.g., when other requirements force a safer encoding
 (digitally signed messages require 7bit encoding).  Besides the normal
 @acronym{MIME} encodings, @code{qp-or-base64} may be used to indicate that for
 each case the most efficient of quoted-printable and base64 should be
-used.  You can override this setting on a per-message basis by using
-the @code{encoding} @acronym{MML} tag (@pxref{MML Definition}).
+used.
+
+Note that it affects body encoding only when a part is a raw forwarded
+message (which will be made by @code{gnus-summary-mail-forward} with the
+arg 2 for example) or is neither the @samp{text/*} type nor the
+@samp{message/*} type.  Even though in those cases, you can override
+this setting on a per-message basis by using the @code{encoding}
+@acronym{MML} tag (@pxref{MML Definition}).
 
 @item mm-use-ultra-safe-encoding
 @vindex mm-use-ultra-safe-encoding