The type of S/MIME data that an application/pkcs7-mime part contains.
The S/MIME data type is unknown.
The S/MIME content is compressed.
The S/MIME content is encrypted.
The S/MIME content is signed.
The S/MIME content contains only certificates.
The S/MIME content is both signed and encrypted.
The type of S/MIME data that an application/pkcs7-mime part contains.