diff --git a/machines/compute01/mastodon.nix b/machines/compute01/mastodon.nix
index 943381b..f1784fe 100644
--- a/machines/compute01/mastodon.nix
+++ b/machines/compute01/mastodon.nix
@@ -9,8 +9,13 @@ in
 
     localDomain = host;
     smtp = {
-      # TODO: smtp setup
       fromAddress = "social@services.dgnum.eu";
+      createLocally = false;
+      host = "kurisu.lahfa.xyz";
+      port = 465;
+      user = "web-services@infra.dgnum.eu";
+      passwordFile = config.age.secrets.mastodon-smtp-password.path;
+      authenticate = true;
     };
 
     streamingProcesses = 4;
diff --git a/machines/compute01/secrets/mastodon-smtp-password b/machines/compute01/secrets/mastodon-smtp-password
new file mode 100644
index 0000000..582c48b
Binary files /dev/null and b/machines/compute01/secrets/mastodon-smtp-password differ
diff --git a/machines/compute01/secrets/secrets.nix b/machines/compute01/secrets/secrets.nix
index 32887c6..1efa278 100644
--- a/machines/compute01/secrets/secrets.nix
+++ b/machines/compute01/secrets/secrets.nix
@@ -13,6 +13,7 @@ lib.setDefault { inherit publicKeys; } [
   "librenms-database_password_file"
   "librenms-environment_file"
   "mastodon-extra_env_file"
+  "mastodon-smtp-password"
   "nextcloud-adminpass_file"
   "nextcloud-s3_secret_file"
   "outline-oidc_client_secret_file"