diff --git a/src/main/java/envoy/server/Startup.java b/src/main/java/envoy/server/Startup.java
index 63415aa..a8be82f 100755
--- a/src/main/java/envoy/server/Startup.java
+++ b/src/main/java/envoy/server/Startup.java
@@ -14,7 +14,15 @@ import envoy.server.data.PersistenceManager;
 import envoy.server.net.ConnectionManager;
 import envoy.server.net.ObjectMessageProcessor;
 import envoy.server.net.ObjectMessageReader;
-import envoy.server.processors.*;
+import envoy.server.processors.ContactOperationProcessor;
+import envoy.server.processors.ContactSearchProcessor;
+import envoy.server.processors.GroupCreationProcessor;
+import envoy.server.processors.GroupMessageProcessor;
+import envoy.server.processors.IDGeneratorRequestProcessor;
+import envoy.server.processors.LoginCredentialProcessor;
+import envoy.server.processors.MessageProcessor;
+import envoy.server.processors.MessageStatusChangeProcessor;
+import envoy.server.processors.UserStatusChangeProcessor;
 import envoy.util.EnvoyLog;
 
 /**
@@ -61,6 +69,7 @@ public class Startup {
 		Server server = new Server(8080, ObjectMessageReader::new,
 				new ObjectMessageProcessor(Set.of(new LoginCredentialProcessor(),
 						new MessageProcessor(),
+						new GroupMessageProcessor(),
 						new GroupCreationProcessor(),
 						new MessageStatusChangeProcessor(),
 						new UserStatusChangeProcessor(),
diff --git a/src/main/java/envoy/server/processors/GroupMessageProcessor.java b/src/main/java/envoy/server/processors/GroupMessageProcessor.java
index 087e2c0..a356c6e 100644
--- a/src/main/java/envoy/server/processors/GroupMessageProcessor.java
+++ b/src/main/java/envoy/server/processors/GroupMessageProcessor.java
@@ -8,6 +8,7 @@ import javax.persistence.EntityExistsException;
 
 import envoy.data.GroupMessage;
 import envoy.data.Message.MessageStatus;
+import envoy.event.MessageStatusChangeEvent;
 import envoy.server.data.PersistenceManager;
 import envoy.server.net.ConnectionManager;
 import envoy.server.net.ObjectWriteProxy;
@@ -31,16 +32,28 @@ public class GroupMessageProcessor implements ObjectProcessor<GroupMessage> {
 		ConnectionManager connectionManager = ConnectionManager.getInstance();
 
 		final var members = PersistenceManager.getInstance().getGroupByID(groupMessage.getRecipientID()).getContacts();
-		for (long i = 0; i < groupMessage.getMemberStatuses().size(); i++) {
-			groupMessage.getMemberStatuses().replace(i, MessageStatus.SENT);
-		}
+		members.forEach(user -> groupMessage.getMemberStatuses().replace(user.getID(), MessageStatus.SENT));
 		members.forEach(user -> { setMemberStatus(connectionManager, groupMessage, user.getID()); });
+		// Setting memberStatus of sender to READ
+		groupMessage.getMemberStatuses()
+			.replace(members.stream().filter(sender -> groupMessage.getSenderID() == sender.getID()).findAny().get().getID(), MessageStatus.READ);
 
 		// Checks if all memberMessageStatuses are RECEIVED and if so sets the
-		// groupMessage Status to RECEIVED.
-		if (!groupMessage.getMemberStatuses().containsValue(MessageStatus.SENT)) groupMessage.setStatus(MessageStatus.RECEIVED);
+		// groupMessage Status to RECEIVED and sends a MessageStatusChangeEvent to the
+		// sender, if he is still online.
+		if (!groupMessage.getMemberStatuses().containsValue(MessageStatus.SENT)) {
+			groupMessage.setStatus(MessageStatus.RECEIVED);
+			if (connectionManager.isOnline(connectionManager.getUserIdBySocketId(socketID))) try {
+				writeProxy.write(socketID, new MessageStatusChangeEvent(groupMessage));
+			} catch (IOException e) {
+				logger.warning("Sender of the groupMessage online. Failed to send MessageStatusChangeEvent");
+				e.printStackTrace();
+			}
+		}
 
-		members.forEach(user -> { sendToMember(connectionManager, groupMessage, user.getID(), writeProxy); });
+		members.stream()
+			.filter(m -> groupMessage.getSenderID() != m.getID())
+			.forEach(user -> { sendToMember(connectionManager, groupMessage, user.getID(), writeProxy); });
 
 		try {
 			PersistenceManager.getInstance().addMessage(new envoy.server.data.GroupMessage(groupMessage, new Date()));
diff --git a/src/main/java/envoy/server/processors/MessageProcessor.java b/src/main/java/envoy/server/processors/MessageProcessor.java
index a326d8c..5a36b8f 100755
--- a/src/main/java/envoy/server/processors/MessageProcessor.java
+++ b/src/main/java/envoy/server/processors/MessageProcessor.java
@@ -31,6 +31,10 @@ public class MessageProcessor implements ObjectProcessor<Message> {
 
 	@Override
 	public void process(Message message, long socketID, ObjectWriteProxy writeProxy) {
+		// Makes sure, that there are no groupMessages processed here, because
+		// groupMessage is a subclass of message.
+		if (message.getClass().equals(envoy.data.GroupMessage.class)) return;
+
 		message.nextStatus();
 		ConnectionManager	connectionManager	= ConnectionManager.getInstance();