extern const uschar *qualify_domain_recipient; /* Domain to qualify recipients with */
extern uschar *qualify_domain_sender; /* Domain to qualify senders with */
extern uschar *queue_domains; /* Queue these domains */
-#ifdef EXPERIMENTAL_QUEUE_RAMP
+#ifndef DISABLE_QUEUE_RAMP
extern BOOL queue_fast_ramp; /* 2-phase queue-run overlap */
#endif
extern BOOL queue_list_requires_admin; /* TRUE if -bp requires admin */
extern FILE *spool_data_file; /* handle for -D file */
extern uschar *spool_directory; /* Name of spool directory */
extern BOOL spool_wireformat; /* can write wireformat -D files */
-#ifdef EXPERIMENTAL_SRS
+#ifdef EXPERIMENTAL_SRS_ALT
extern uschar *srs_config; /* SRS config secret:max age:hash length:use timestamp:use hash */
extern uschar *srs_db_address; /* SRS db address */
extern uschar *srs_db_key; /* SRS db key */
extern BOOL srs_usehash; /* SRS use hash flag */
extern BOOL srs_usetimestamp; /* SRS use timestamp flag */
#endif
-#ifdef EXPERIMENTAL_SRS_NATIVE
+#ifdef SUPPORT_SRS
extern uschar *srs_recipient; /* SRS recipient */
#endif
extern BOOL strict_acl_vars; /* ACL variables have to be set before being used */