diff --git a/nixos/modules/mail.nix b/nixos/modules/mail.nix
index 95f37d2..5ca57b3 100644
--- a/nixos/modules/mail.nix
+++ b/nixos/modules/mail.nix
@@ -241,7 +241,7 @@ in {
                 private-key = "%{file:/run/secrets/dkim_rsa}%";
                 domain = "${domain}";
                 selector = "rsa-default";
-                headers = ["From" "To" "Cc" "Subject" "Date" "Message-ID" "Organization" "MIME-Version" "Content-Type" "In-Reply-To" "References" "List-Id" "Thread-Topic" "Thread-Index"]; # default from https://stalw.art/docs/smtp/authentication/dkim/sign#signatures except "User-Agent" which somehow breaks
+                headers = ["From" "To" "Cc" "Date" "Subject" "Message-ID" "Organization" "MIME-Version" "Content-Type" "In-Reply-To" "References" "List-Id" "Thread-Topic" "Thread-Index"]; # default from https://stalw.art/docs/smtp/authentication/dkim/sign#signatures except "User-Agent" which somehow breaks
                 algorithm = "rsa-sha256";
                 canonicalization = "relaxed/relaxed";
               };
@@ -249,7 +249,7 @@ in {
                 private-key = "%{file:/run/secrets/dkim_ed25519}%";
                 domain = "${domain}";
                 selector = "ed-default";
-                headers = ["From" "To" "Cc" "Subject" "Date" "Message-ID" "Organization" "MIME-Version" "Content-Type" "In-Reply-To" "References" "List-Id" "Thread-Topic" "Thread-Index"]; # default from https://stalw.art/docs/smtp/authentication/dkim/sign#signatures except "User-Agent" which somehow breaks
+                headers = ["From" "To" "Cc" "Date" "Subject" "Message-ID" "Organization" "MIME-Version" "Content-Type" "In-Reply-To" "References" "List-Id" "Thread-Topic" "Thread-Index"]; # default from https://stalw.art/docs/smtp/authentication/dkim/sign#signatures except "User-Agent" which somehow breaks
                 algorithm = "ed25519-sha256";
                 canonicalization = "relaxed/relaxed";
               };