thru RFC\-2049. Currently
.B mhbuild
only supports encodings in
-message bodies, and does not support the encoding of message headers as
+message bodies, and does support the encoding of message headers as
specified in RFC\-2047.
.PP
If you specify the name of the composition file as `-',
is the name of a valid
composition file, and the translation is successful,
.B mhbuild
-will replace the original file with the new MIME message. It will rename
-the original file to start with the `,' character and end with the
-string `.orig', e.g., if you are editing the file `draft',
-it will be renamed to `,draft.orig'. This allows you to easily
+will replace the original file with the new MIME message.
+It will preserve the original file under the same name with `.orig'
+appended.
+E.g., if you are editing the file `draft', its original contents
+it will be preserved as `draft.orig'. This allows you to easily
recover the
.B mhbuild
input file.