Fixed sending after connectivity change

app/src/main/java/eu/faircode/email/ServiceSynchronize.java

@@ -70,7 +70,6 @@ import java.util.Map;
 import java.util.Properties;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
-import java.util.concurrent.RejectedExecutionException;
 import java.util.concurrent.Semaphore;
 
 import javax.mail.Address;
@@ -617,7 +616,6 @@ public class ServiceSynchronize extends LifecycleService {
                         final long fid = intent.getLongExtra("folder", -1);
                         //Log.v(Helper.TAG, "run operations folder=" + fid);
 
-                        try {
                         executor.submit(new Runnable() {
                             @Override
                             public void run() {
@@ -666,9 +664,6 @@ public class ServiceSynchronize extends LifecycleService {
                                 }
                             }
                         });
-                        } catch (RejectedExecutionException ex) {
-                            Log.w(Helper.TAG, ex + "\n" + Log.getStackTraceString(ex));
-                        }
                     }
                 };
 
@@ -1463,7 +1458,6 @@ public class ServiceSynchronize extends LifecycleService {
                         for (Thread t : threads)
                             join(t);
                         threads.clear();
-                        executor.shutdown();
 
                         // Stop monitoring outbox
                         lbm.unregisterReceiver(outboxReceiver);
@@ -1504,7 +1498,6 @@ public class ServiceSynchronize extends LifecycleService {
                 Properties props = MessageHelper.getSessionProperties();
                 final Session isession = Session.getInstance(props, null);
 
-                try {
                 executor.submit(new Runnable() {
                     @Override
                     public void run() {
@@ -1519,9 +1512,6 @@ public class ServiceSynchronize extends LifecycleService {
                         }
                     }
                 });
-                } catch (RejectedExecutionException ex) {
-                    Log.w(Helper.TAG, ex + "\n" + Log.getStackTraceString(ex));
-                }
             }
         };
     }