The Bcc property adds to the list of blind copy (Bcc) recipients for the NewMail object. Write-only.
objNewMail.Bcc
String
The value you use to set the Bcc property can represent a single recipient or a list of recipients. Each recipient must be represented by a full messaging address:
"useraddress@company.com"
Multiple recipients on the list are separated by semicolons:
"user1@company1.com;user2@company2.com;user3@company3.com"