#define LOGGING(opt) BIT_TEST(log_selector, log_selector_size, Li_##opt)
/* Private error numbers for delivery failures, set negative so as not
-to conflict with system errno values. */
+to conflict with system errno values. Take care to maintain the string
+table exim_errstrings[] in log.c */
#define ERRNO_UNKNOWNERROR (-1)
#define ERRNO_USERSLASH (-2)
#define ERRNO_QUEUE_DOMAIN (-55) /* Domain in queue_domains */
#define ERRNO_TRETRY (-56) /* Transport concurrency limit */
+
+
/* Special actions to take after failure or deferment. */
enum {