Return OK after a successful ManageSieve SASL authentication flow (fixes #187)

crates/common/src/scripts/plugins/bayes.rs

@@ -88,8 +88,6 @@ async fn train(ctx: PluginContext<'_>, is_train: bool) -> Variable {
         return false.into();
     }
 
-    let c = println!("training: {:?} {}", text, is_spam);
-
     // Train the model
     let mut model = BayesModel::default();
     model.train(

crates/managesieve/src/op/authenticate.rs

@@ -158,6 +158,9 @@ impl<T: SessionStream> Session<T> {
                 in_flight,
             };
 
+            let _ = self
+                .write(&StatusResponse::ok("Authentication successful").into_bytes())
+                .await;
             self.handle_capability("Authentication successful").await
         } else {
             match &self.state {