diff --git a/configuration/hosts/hainich/services/mail.nix b/configuration/hosts/hainich/services/mail.nix
index ddda13b..160e659 100644
--- a/configuration/hosts/hainich/services/mail.nix
+++ b/configuration/hosts/hainich/services/mail.nix
@@ -134,6 +134,7 @@
     virusScanning = false;
   };
   services.postfix.submissionOptions.smtpd_sender_restrictions = "reject_non_fqdn_sender,reject_unknown_sender_domain,permit";
+  services.postfix.submissionsOptions.smtpd_sender_restrictions = "reject_non_fqdn_sender,reject_unknown_sender_domain,permit";
   services.postfix.virtual = ''
     @4future.dev @hacc.space
     @4futu.re @hacc.space