The BCC property specifies the blind carbon copy (Bcc) recipients for this message.
Property BCC as String HRESULT get_BCC(BSTR* pVal); HRESULT put_BCC(BSTR Val);
This property is also available as the urn:schemas:mailheader:bcc and urn:schemas:httpmail:bcc fields.
The string in the BCC property can represent a single recipient or multiple recipients. Each address in the list must be a full messaging address, such as
"User" <email@example.com> or
In lists of multiple recipients, commas separate addresses, as follows:
"User1" <firstname.lastname@example.org >, "User 2" <email@example.com >, "User3" <firstname.lastname@example.org>
A comma is not valid in any part of a messaging address unless it is enclosed in quotation marks.
To maintain the privacy intended by blind copies, BCC is regarded as an envelope property rather than a message property; accordingly, the corresponding header field and its contents are removed when the message is delivered, and the BCC property is always empty on a received message.
The default value of the BCC property is an empty string.