I am having difficulty creating a mailing list on Thunderbird. The steps I am trying to follow are from Mozilla Support (How to create and use mailing lists on Thunderbird). When I open the Address Book and select File/New, the options Address Book Contact and Mailing List are both in grey. This means I am not able to select Mailing List as instructed, and I can't see how to proceed. When I first open the Address Book, the headings New Contact/New List/Properties/Delete are also in grey. Another set of online instructions recommends using New List as a way of setting up a mailing list, but I can't proceed that way either. A snip of this view is attached (I have been unable to snip the File/New/Mailing List view). Any help would be very much appreciated. Meggs