ContentTransferEncoding is a String property that specifies the MIME encoding used to represent data in a message for transfer using a mail transport protocol. Common values for ContentTransferEncoding include the following:
- 7bit - Message contains 7-bit un-encoded US-ASCII data (Default).
- 8bit - Message contains 8-bit un-encoded data.
- binary - Message contains an un-encoded octet stream.
- quoted-printable - Message contents transformed to 7-bit US-ASCII using quoted-printable encoding algorithm.
- base64 - Message contents transformed to 7-bit US-ASCII using Base64 encoding algorithm.
Use ContentType to determine the oringinal media type and character set for a message.