Add your name to the “TO” field and enter the lists/categories/groups in the BCC field.
With your message window open,click on “TO” to open your address book for emailing. When your address book opens, it will have the little blue “Category” link at the top of it. Click on that to open your category/lists.
Check the BCC boxes next to the titles you wish to send to, go to the top and click on “Insert Checked Contacts.”