-#define EXISTS (1<<0) /* exists */
-#define DELETED (1<<1) /* deleted */
-#define SELECTED (1<<2) /* selected for use */
-#define SELECT_EMPTY (1<<3) /* "new" message */
-#define SELECT_UNSEEN (1<<4) /* inc/show "unseen" */
-
-#define MBITS "\020\01EXISTS\02DELETED\03SELECTED\04NEW\05UNSEEN"