Put automatically in BCC some emails

[Cadey]

Hello

Customer asked me if it was possible to put an address automatically in blind copy for every emails going out. Any clue?

For instance : [email protected] should be in BCC for every mail going out through the SMTP server.

Also is it possible to set this option on a "case" basis?
For instance I only want that emails sent from user "[email protected]" to be blind copied to "[email protected]"

Thanks for your help!