-/* $Cambridge: exim/src/src/exim.h,v 1.10 2005/03/22 14:11:54 ph10 Exp $ */
+/* $Cambridge: exim/src/src/exim.h,v 1.12 2005/05/10 10:19:11 ph10 Exp $ */
/*************************************************
* Exim - an Internet mail transport agent *
#include <sys/file.h>
#include <dirent.h>
#include <netdb.h>
+#include <poll.h>
#include <pwd.h>
#include <grp.h>
#include <syslog.h>
#define T_SRV 33
#endif
-/* We use the private type T_ZNS for retrieving the nameservers for the
-enclosing zone of a domain, and the private type T_MXH for retrieving
-the MX hostnames only (without their priorities). */
+/* We define a few private types for special DNS lookups:
+
+ . T_ZNS gets the nameservers of the enclosing zone of a domain
+
+ . T_MXH gets the MX hostnames only (without their priorities)
+
+ . T_CSA gets the domain's Client SMTP Authorization SRV record
+
+*/
#define T_ZNS (-1)
#define T_MXH (-2)
+#define T_CSA (-3)
/* The resolv.h header defines __P(x) on some Solaris 2.5.1 systems (without
checking that it is already defined, in fact). This conflicts with other