http://schema.org/EmailMessage currently has the http://schema.org/recipient property for specifying who received the message. Sometimes it is useful to be able to break out whether the recipient was cc'ed or bcc'ed on the message.

I propose adding the following subproperties to http://schema.org/recipient:

• to_recipient: The Person or Organization the message was directly sent to.
• cc_recipient: The Person or Organization copied on a message.
• bcc_recipient: The Person or Organization blind copied on a message.