(accidentally left out of the rest of the libmrclient commit)
--- /dev/null
+/* $Id$
+ *
+ * Copyright (C) 1999 by the Massachusetts Institute of Technology
+ *
+ */
+
+#ifndef _mrclient_h_
+#define _mrclient_h_
+
+#define MRCL_SUCCESS 0
+#define MRCL_FAIL 1
+#define MRCL_REJECT 2
+#define MRCL_ENOMEM 3
+#define MRCL_MOIRA_ERROR 4
+#define MRCL_AUTH_ERROR 4
+
+int mrcl_connect(char *server, char *client, int auth);
+char *mrcl_krb_user(void);
+
+int mrcl_validate_pobox_smtp(char *user, char *address, char **ret);
+
+#endif /* _mrclient_h_ */