This property sets the encoding method of email sender name, recipient name, subject and attachments' name.
Data Type: Long
Set the property to one of the following values:
|1||base64( Default )|
By setting this property to 1 or 2 to encode email's subject and attachment name to base64 or quoted-printable format. We suggest to set this property to 1 or 2 if current email includes non-ascii characters.