Get the name of content transfer encoding the MIME part body is encoded to.
The string containing "Content-Transfer-Encoding" header value, or a null reference (Nothing in Visual Basic) if the part does not have "Content-Transfer-Encoding" header set.
Examples: "base64", "Quoted-Printable", "X-UUE", "7bit", "binary".
If this value is missing, the MIME part body is not encoded. This is the same as "7bit", "8bit", or "binary".
ImapBodyStructure Class | MailBee.ImapMail Namespace