diff --git a/core/src/main/java/de/srsoftware/umbrella/core/model/Envelope.java b/core/src/main/java/de/srsoftware/umbrella/core/model/Envelope.java
index 448297e7..979be7a9 100644
--- a/core/src/main/java/de/srsoftware/umbrella/core/model/Envelope.java
+++ b/core/src/main/java/de/srsoftware/umbrella/core/model/Envelope.java
@@ -10,6 +10,7 @@ import static java.text.MessageFormat.format;
 
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import java.time.LocalDateTime;
+import java.util.Collection;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
@@ -26,9 +27,9 @@ public class Envelope<T extends Message<?>> {
 		this(message,new HashSet<>(Set.of(receiver)));
 	}
 
-	public Envelope(T message, HashSet<User> receivers) {
+	public Envelope(T message, Collection<? extends User> receivers) {
 		this.message = message;
-		this.receivers = receivers;
+		this.receivers = new HashSet<>(receivers);
 		time = LocalDateTime.now();
 	}
 
diff --git a/messages/src/main/java/de/srsoftware/umbrella/message/MessageSystem.java b/messages/src/main/java/de/srsoftware/umbrella/message/MessageSystem.java
index 6a2853f4..d4627ef2 100644
--- a/messages/src/main/java/de/srsoftware/umbrella/message/MessageSystem.java
+++ b/messages/src/main/java/de/srsoftware/umbrella/message/MessageSystem.java
@@ -168,12 +168,8 @@ public class MessageSystem extends BaseHandler implements PostBox, EventListener
 
 	@Override
 	public void onEvent(Event<?> event) {
-		for (var user : event.audience()){
-			if (debugAddress != null && !debugAddress.equals(user.email().toString())) continue;
-			var message = new TranslatableMessage(event.initiator(),event.subject(),event.describe(),null);
-			var envelope = new Envelope<>(message,user);
-			send(envelope);
-		}
+		var message = new TranslatableMessage(event.initiator(),event.subject(),event.describe(),null);
+		send(new Envelope<>(message,event.audience()));
 	}
 
 	private boolean patchSettings(HttpExchange ex, UmbrellaUser user) throws IOException {
@@ -216,6 +212,10 @@ public class MessageSystem extends BaseHandler implements PostBox, EventListener
 		var date = new Date();
 
 		for (var receiver : dueRecipients){
+			if (debugAddress != null && !debugAddress.equals(receiver.email().toString())) {
+				LOG.log(DEBUG,"Debug address is set to {0}, ignoring mail to {1}",debugAddress,receiver);
+				continue;
+			}
 			var combined = new CombinedMessage(t("Collected messages"),receiver);
 
 			try {
@@ -300,6 +300,7 @@ public class MessageSystem extends BaseHandler implements PostBox, EventListener
 					env.receivers().add(receiver);
 				}
 				map.values().forEach(queue::push);
+				break;
 			default:
 				return;
 		}
diff --git a/messages/src/main/java/de/srsoftware/umbrella/message/model/CombinedMessage.java b/messages/src/main/java/de/srsoftware/umbrella/message/model/CombinedMessage.java
index ef2e924c..2f0b78c6 100644
--- a/messages/src/main/java/de/srsoftware/umbrella/message/model/CombinedMessage.java
+++ b/messages/src/main/java/de/srsoftware/umbrella/message/model/CombinedMessage.java
@@ -20,7 +20,7 @@ public class CombinedMessage {
 	private UmbrellaUser sender = null;
 
 	public CombinedMessage(Translatable subjectForCombinedMessage, User receiver){
-		LOG.log(DEBUG,"Creating combined message…");
+		LOG.log(DEBUG,"Creating combined message for {0}…",receiver);
 		this.subjectForCombinedMessage = subjectForCombinedMessage;
 		this.receiver = receiver;
 	}
@@ -38,12 +38,11 @@ public class CombinedMessage {
 				combinedSubject = subject;
 				break;
 			case 1:
-				combinedBody.insert(0,format("# {0}:\n# {1}:\n\n",sender,subject)); // insert sender and subject of first message right before the body of the first message
+				combinedBody.insert(0,format("# {0} / {1}:\n\n",sender,subject)); // insert sender and subject of first message right before the body of the first message
 				combinedSubject = subjectForCombinedMessage.translate(lang);
 				// no break here, we need to append the subject and content
 			default:
-				combinedBody.append("\n\n# ").append(message.sender()).append(":\n");
-				combinedBody.append("# ").append(subject).append(":\n\n");
+				combinedBody.append("\n\n━━━━━━━━━━━━━━━━━━━━━\n\n# ").append(message.sender()).append(" / ").append(subject).append(":\n\n");
 				combinedBody.append(body);
 		}
 		if (message.attachments() != null) attachments.addAll(message.attachments());
diff --git a/messages/src/main/java/de/srsoftware/umbrella/message/model/Instantly.java b/messages/src/main/java/de/srsoftware/umbrella/message/model/Instantly.java
index db6f2d0d..b580de07 100644
--- a/messages/src/main/java/de/srsoftware/umbrella/message/model/Instantly.java
+++ b/messages/src/main/java/de/srsoftware/umbrella/message/model/Instantly.java
@@ -13,7 +13,7 @@ public class Instantly implements Settings{
 
 	@Override
 	public boolean sendAt(Integer scheduledHour) {
-		return false;
+		return true;
 	}
 
 	@Override