diff --git a/policy.h b/policy.h
index 57ccfdb..2294187 100644
--- a/policy.h
+++ b/policy.h
@@ -581,6 +581,10 @@
# define NEED_MAIL_TO_ON_CLI
#endif
+#ifdef linux
+# define MAILER "/usr/sbin/sendmail"
+# define NEED_MAIL_HEADERS
+#endif
#ifndef MAILER
# define MAILER "/usr/sbin/sendmail -t -i"
#endif