Working in a corporate environment I've come to believe there are very few times when blind copying someone on an email is a good idea. While the idea is nice, if the person you BCCed does a reply to all (either intentionally, or unintentionally), everyone will know that you BCCed them on the original which might mean you have some tough explaining to do. Instead of using BCC, I'll just send the original email then forward a copy of the sent message to the person I want to loop in. Much safer.