rfc2047-encoding-type

rfc2047-encoding-type is a variable defined in `rfc2047.el'.
Its value is

address-mime

Documentation:
The type of encoding done by `rfc2047-encode-region'.
This should be dynamically bound around calls to
`rfc2047-encode-region' to either `mime' or `address-mime'. See
`rfc2047-header-encoding-alist', for definitions.