diff --git a/module.nix b/module.nix
index fc3b26d..05399a7 100644
--- a/module.nix
+++ b/module.nix
@@ -96,6 +96,7 @@ in
       smtp = {
         createLocally = false;
         user = "noreply.mastodon@${sp.domain}";
+        fromAddress = "noreply.mastodon@${sp.domain}";
         passwordFile = "/var/lib/mastodon/secrets/smtp-password";
         authenticate = true;
       };