rfc2047-charset-encoding-alist

rfc2047-charset-encoding-alist is a variable defined in `rfc2047.el'.
Its value is shown below.

Documentation:
Alist of MIME charsets to RFC2047 encodings.
Valid encodings are nil, `Q' and `B'. These indicate binary (no) encoding,
quoted-printable and base64 respectively.

Value:

((us-ascii)
 (iso-8859-1 . Q)
 (iso-8859-2 . Q)
 (iso-8859-3 . Q)
 (iso-8859-4 . Q)
 (iso-8859-5 . B)
 (koi8-r . B)
 (iso-8859-7 . B)
 (iso-8859-8 . B)
 (iso-8859-9 . Q)
 (iso-8859-14 . Q)
 (iso-8859-15 . Q)
 (iso-2022-jp . B)
 (iso-2022-kr . B)
 (gb2312 . B)
 (gbk . B)
 (gb18030 . B)
 (big5 . B)
 (cn-big5 . B)
 (cn-gb . B)
 (cn-gb-2312 . B)
 (euc-kr . B)
 (iso-2022-jp-2 . B)
 (iso-2022-int-1 . B)
 (viscii . Q))