The TransferEncoding property sets or gets the MIME transfer encoding.
Sets or returns a String value.
The application supports the following transfer encoding:
base64
quoted-printable
8bit
7bit
base64 encoding will work with any kind Content Type
quoted-printable, 8bit and 7bit should be used with text/ based
contents
Setting the property to Auto will instruct the application to compute the best possible encoding for the content.