diff --git a/modules/mail/default.nix b/modules/mail/default.nix
index e5a6023..17da146 100644
--- a/modules/mail/default.nix
+++ b/modules/mail/default.nix
@@ -41,7 +41,6 @@ in
           hostname = "chpu.eu";
           tls = {
             enable = true;
-            implicit = true;
           };
           listener = {
             smtp = {