1 files changed, 1 insertions, 0 deletions

diff --git a/ymir.nix b/ymir.nix
index b75ddf83..d7ad8255 100644
--- a/ymir.nix
+++ b/ymir.nix
@@ -410,6 +410,7 @@ in rec {
         permit_mynetworks,
         reject_non_fqdn_helo_hostname,
         reject_invalid_helo_hostname,
+        reject_unknown_reverse_client_hostname,
         permit
 
       smtpd_recipient_restrictions =