diff --git a/pastila/smtp.nix b/pastila/smtp.nix
index 437711a..564ffb6 100644
--- a/pastila/smtp.nix
+++ b/pastila/smtp.nix
@@ -11,6 +11,9 @@ in
     enable = true;
     selector = opendkim_selector;
     domains = "csl:isomorphis.me,tremeg.net,gueneau.me";
+    configFile = builtins.toFile "dkimconfig" ''
+      RequireSafeKeys false
+    '';
   };
 
   users.groups."vmail" = {};