How To Put Email Addresses In the BCC Field From a Group Name In Contacts ?

When I want to send an email to a group from Contacts, I right-click on the group name and select “Send an email to “group name” “. This will open a new email window and all the email addresses of the members will be in the “To” field. Is it possible to make it go to the “BCC” field instead? With all the security problems and since everyone want privacy, I don’t want to send these emails using the “To” field… So now, I have to select all the email address (using Cmd-A) and drag & drop these addresses in the “BCC” field.
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Alain Robert