diff --git a/modules/mail/default.nix b/modules/mail/default.nix
index 0ec2f8d..f88975e 100644
--- a/modules/mail/default.nix
+++ b/modules/mail/default.nix
@@ -326,7 +326,6 @@ in
         "dkim_signing.conf".text = ''
           selector = "quitte-rspamd";
           allow_username_mismatch = true;
-          allow_hdrfrom_mismatch = true;
           path = /var/lib/rspamd/dkim/$domain.$selector.key;
 
         '';