+receive. By default, `notmuch config` will use the tags *inbox* and *unread*.
+
+If `maildir.synchronize_flags` is true (which is the default), Maildir flags
+have precedence over the initial tags. Thus an already read mail gets its
+initial *unread* tag correctly removed.
+
+## The *new* tag approach
+
+Here's another very general and ad-hoc approach to initial message tagging,
+which sets all new messages to get the *new* tag: