+#define EXPERIMENTAL_DCC
+#define EXPERIMENTAL_DSN_INFO
+#define EXPERIMENTAL_DMARC
+ #define DMARC_TLD_FILE "/etc/exim/opendmarc.tlds"
+#define EXPERIMENTAL_LMDB
+#define EXPERIMENTAL_PIPE_CONNECT
+#define EXPERIMENTAL_REQUIRETLS
+#define EXPERIMENTAL_QUEUEFILE
+#define EXPERIMENTAL_SRS
+
+
+/* For developers */
+#define WANT_DEEPER_PRINTF_CHECKS