如何使用用于Xpages的服务器端Javascript向BCC收件人发送电子邮件

我正在使用服务器端javascript向一些收件人发送电子邮件。我能够向收件人和抄送收件人发送电子邮件。请指导如何使用服务器端Javascript for Xpages向密件抄送收件人发送电子邮件。我现在的代码是

enter code here
var mailDoc:NotesDocument = database.createDocument();
var mailBody = mailDoc.createMIMEEntity();
var mailSubject = mailBody.createHeader("Subject");
mailSubject.setHeaderVal("Test email");
stream.writeText( "This email is to be sent to BCC recipeints also");
mailBody.setContentFromText(stream, "text/html; charset=iso 8859-1",0);     
mailDoc.replaceItemValue("SendTo","ToUser@test.com");
mailDoc.replaceItemValue("CopyTo","CCUser@test.com");       
mailDoc.send(); 

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使用密件抄送收件人将字段

blindcopy设置为

mailDoc.replaceItemValue("BlindCopyTo","BCCUser@test.com");