diff --git a/src/main/java/de/ozgcloud/nachrichten/postfach/osiv2/transfer/PostfachApiFacadeService.java b/src/main/java/de/ozgcloud/nachrichten/postfach/osiv2/transfer/PostfachApiFacadeService.java
index 13fa9e923020ab979f611e821a652237a79c173e..246a12108b9fdc919df2bd87b11aa93219f71d8a 100644
--- a/src/main/java/de/ozgcloud/nachrichten/postfach/osiv2/transfer/PostfachApiFacadeService.java
+++ b/src/main/java/de/ozgcloud/nachrichten/postfach/osiv2/transfer/PostfachApiFacadeService.java
@@ -14,11 +14,9 @@ import lombok.extern.log4j.Log4j2;
 @Log4j2
 @Service
 @ConditionalOnProperty("ozgcloud.osiv2-postfach.enabled")
-public record PostfachApiFacadeService(
-		MessageExchangeApi messageExchangeApi,
-		RequestMapper requestMapper,
-		ResponseMapper responseMapper
-) {
+public record PostfachApiFacadeService(MessageExchangeApi messageExchangeApi, RequestMapper requestMapper, ResponseMapper responseMapper) {
+
+	private static int MAX_NUMBER_RECEIVED_MESSAGES = 100;
 	public void sendMessage(PostfachNachricht nachricht) {
 		messageExchangeApi.sendMessage(
 				requestMapper.mapMailboxId(nachricht),
@@ -27,7 +25,7 @@ public record PostfachApiFacadeService(
 	}
 
 	public Stream<PostfachNachricht> receiveMessages() {
-		var response = messageExchangeApi.receiveMessages(100, 0).block();
+		var response = messageExchangeApi.receiveMessages(MAX_NUMBER_RECEIVED_MESSAGES, 0).block();
 		return response.getMessages().stream().map(this::fetchMessageByGuid);
 	}