I am unable to forward emails! When I hit the "Forward" button to screen shows "To" with a down arrow. However, the down arrow only gives me the option of putting "To", "cc", "Bcc ", and "Reply To". In the recent past these headings were listed separately and when I selected "Bcc" for example, my address book was displayed from which I could select recipients. How can I add address book names to a forwarded email? Something must have have changed very recently. If I cannot forward emails using Thunderbird then I'll have no choice but to change to another email service.