diff --git a/applications/email.nix b/applications/email.nix
index 5963fc5..683d7ca 100644
--- a/applications/email.nix
+++ b/applications/email.nix
@@ -309,7 +309,7 @@ in {
     services.nginx.virtualHosts = {
       "${cfg.sub}.${cfg.domain}" = {
         forceSSL = true;
-        useACMEHost = "skynet";
+        useACMEHost = "mail";
         # override the inbuilt nginx config
         enableACME = false;
         serverName = "${cfg.sub}.${cfg.domain}";