diff --git a/hosts/mastodon/default.nix b/hosts/mastodon/default.nix
index 1a49de01..9d78768d 100644
--- a/hosts/mastodon/default.nix
+++ b/hosts/mastodon/default.nix
@@ -35,12 +35,10 @@
     localDomain = "c3d2.social";
 
     smtp = {
-      # TODO
-      host = "c3d2.social";
+      host = "mail.c3d2.de";
+      port = 587;
       fromAddress = "mail@c3d2.social";
       authenticate = false;
-      # user
-      # passwordFile
     };
 
     elasticsearch.host = "127.0.0.1";