All ADs will be added to the iesg@ietf.org list of course, and also to the private lists mentioned at the IESG Internal wiki.
All ADs need to keep an eye on the main ietf@ietf.org list for matters concerning their Area and the IESG as a whole. It's also assumed that ADs track the ietf-announce@ietf.org list.
Each area has its own lists (Directorates etc.) and of course ADs need to keep in touch with WG mail, either by being subscribed or reading archives.