diff --git a/spec/postfach-api-facade.yaml b/spec/postfach-api-facade.yaml
index a8aa628e214ede3018cf777e6ab435b828411306..ac32d8ce022f44d50c0986b906df6e32f0eeb188 100644
--- a/spec/postfach-api-facade.yaml
+++ b/spec/postfach-api-facade.yaml
@@ -844,6 +844,7 @@ paths:
                 detail: Der Dienst ist zurzeit nicht verfügbar.
   /MessageExchange/v1/Send/{mailboxId}:
     post:
+      operationId: SendMessage
       tags:
       - MessageExchange
       summary: Sendet eine Nachricht an ein externes oder internes Postfach.
diff --git a/src/main/java/de/ozgcloud/nachrichten/postfach/osiv2/transfer/RequestMapper.java b/src/main/java/de/ozgcloud/nachrichten/postfach/osiv2/transfer/RequestMapper.java
index 127d16d1eb77c9994d2ec99607706db67cdc7cfb..d199e5109946eaf485a636c7adb6bce20babed26 100644
--- a/src/main/java/de/ozgcloud/nachrichten/postfach/osiv2/transfer/RequestMapper.java
+++ b/src/main/java/de/ozgcloud/nachrichten/postfach/osiv2/transfer/RequestMapper.java
@@ -18,10 +18,10 @@ public interface RequestMapper {
 	@Mapping(target = "body", source = "mailBody")
 	@Mapping(target = "displayName", ignore = true)
 	@Mapping(target = "originSender", ignore = true)
-	@Mapping(target = "replyAction", ignore = true)
+	@Mapping(target = "replyAction", constant = "REPLYPOSSIBLE")
 	@Mapping(target = "eidasLevel", constant = "MEDIUM")
 	@Mapping(target = "isObligatory", expression = "java( false )")
-	@Mapping(target = "isHtml", ignore = true)
+	@Mapping(target = "isHtml", expression = "java( true )")
 	@Mapping(target = "files", ignore = true)
 	@Mapping(target = "references", ignore = true)
 	OutSendMessageRequestV2 mapOutSendMessageRequestV2(PostfachNachricht nachricht);
diff --git a/src/test/java/de/ozgcloud/nachrichten/postfach/osiv2/OsiPostfachRemoteServiceITCase.java b/src/test/java/de/ozgcloud/nachrichten/postfach/osiv2/OsiPostfachRemoteServiceITCase.java
index b980765e60ab7dd886636fd865ca6d321e469f4a..4032fec013c3c45adca8bdcca5291b2c483f917c 100644
--- a/src/test/java/de/ozgcloud/nachrichten/postfach/osiv2/OsiPostfachRemoteServiceITCase.java
+++ b/src/test/java/de/ozgcloud/nachrichten/postfach/osiv2/OsiPostfachRemoteServiceITCase.java
@@ -1,10 +1,14 @@
 package de.ozgcloud.nachrichten.postfach.osiv2;
 
 import static de.ozgcloud.nachrichten.postfach.osiv2.factory.JwtFactory.*;
-import static de.ozgcloud.nachrichten.postfach.osiv2.factory.PostfachAddressTestFactory.*;
 import static org.assertj.core.api.Assertions.*;
+import static org.mockserver.mock.OpenAPIExpectation.*;
 import static org.mockserver.model.HttpRequest.*;
 
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Map;
+
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Nested;
@@ -48,12 +52,12 @@ public class OsiPostfachRemoteServiceITCase {
 		registry.add("ozgcloud.osiv2-postfach.api.resource", () -> RESOURCE_URN);
 	}
 
-	private MockServerClient mockClient;
+	private MockServerClient postfachFacadeMockClient;
 
 	@BeforeEach
 	@SneakyThrows
 	public void setup() {
-		mockClient = OSI_MOCK_SERVER_EXTENSION.getPostfachFacadeMockClient();
+		postfachFacadeMockClient = OSI_MOCK_SERVER_EXTENSION.getPostfachFacadeMockClient();
 	}
 
 	@DisplayName("send message")
@@ -62,12 +66,19 @@ public class OsiPostfachRemoteServiceITCase {
 
 		@DisplayName("should send dummy request with jwt")
 		@Test
+		@SneakyThrows
 		void shouldSendDummyRequestWithJwt() {
+			postfachFacadeMockClient.upsert(
+					openAPIExpectation()
+							.withSpecUrlOrPayload(Files.readString(Path.of("spec", "postfach-api-facade.yaml")))
+							.withOperationsAndResponses(Map.of(
+									"SendMessage", "200"
+							))
+			);
+
 			osiPostfachRemoteService.sendMessage(postfachNachricht);
 
-			var requests = mockClient.retrieveRecordedRequests(request()
-					.withPathParameter("mailboxId", MAILBOX_ID)
-					.withPath("/MessageExchange/v1/Send/{mailboxId}"));
+			var requests = postfachFacadeMockClient.retrieveRecordedRequests(request());
 			assertThat(requests).hasSize(1);
 			var jwt = Jwt.parseAuthHeaderValue(
 					requests[0].getHeader("Authorization").getFirst()
diff --git a/src/test/java/de/ozgcloud/nachrichten/postfach/osiv2/extension/OsiMockServerExtension.java b/src/test/java/de/ozgcloud/nachrichten/postfach/osiv2/extension/OsiMockServerExtension.java
index 7de1108b7365907a45a7f8372c0d8960c192af2b..b5b8e935b414d08dae04e02ebeb912cb95feab16 100644
--- a/src/test/java/de/ozgcloud/nachrichten/postfach/osiv2/extension/OsiMockServerExtension.java
+++ b/src/test/java/de/ozgcloud/nachrichten/postfach/osiv2/extension/OsiMockServerExtension.java
@@ -2,16 +2,12 @@ package de.ozgcloud.nachrichten.postfach.osiv2.extension;
 
 import static de.ozgcloud.nachrichten.postfach.osiv2.factory.JwtFactory.*;
 import static org.mockserver.matchers.Times.*;
-import static org.mockserver.mock.OpenAPIExpectation.*;
 import static org.mockserver.model.Header.*;
 import static org.mockserver.model.HttpRequest.*;
 import static org.mockserver.model.HttpResponse.*;
 import static org.mockserver.model.Parameter.*;
 import static org.mockserver.model.ParameterBody.*;
 
-import java.nio.file.Files;
-import java.nio.file.Path;
-
 import org.junit.jupiter.api.extension.AfterAllCallback;
 import org.junit.jupiter.api.extension.AfterEachCallback;
 import org.junit.jupiter.api.extension.BeforeAllCallback;
@@ -40,15 +36,19 @@ public class OsiMockServerExtension implements BeforeAllCallback, AfterAllCallba
 			.withTag("mockserver-5.15.0");
 
 	private final MockServerContainer serviceKontoMockContainer = new MockServerContainer(MOCK_SERVER_IMAGE)
-			.withLogConsumer(outputFrame -> {
-				var line = outputFrame.getUtf8String().stripTrailing();
-				if (outputFrame.getType() == OutputFrame.OutputType.STDERR) {
-					LOG.error(line);
-				} else {
-					LOG.info(line);
-				}
-			});
-	private final MockServerContainer postfachFacadeMockContainer = new MockServerContainer(MOCK_SERVER_IMAGE);
+			.withLogConsumer(this::logContainerOutput);
+	private final MockServerContainer postfachFacadeMockContainer = new MockServerContainer(MOCK_SERVER_IMAGE)
+			.withLogConsumer(this::logContainerOutput);
+
+
+	private void logContainerOutput(OutputFrame outputFrame) {
+		var line = outputFrame.getUtf8String().stripTrailing();
+		if (outputFrame.getType() == OutputFrame.OutputType.STDERR) {
+			System.err.println(line);
+		} else {
+			System.out.println(line);
+		}
+	}
 
 	@Override
 	public void beforeAll(ExtensionContext context) {
@@ -104,9 +104,6 @@ public class OsiMockServerExtension implements BeforeAllCallback, AfterAllCallba
 	@SneakyThrows
 	@Override
 	public void beforeEach(ExtensionContext context) {
-		postfachFacadeMockClient.upsert(
-				openAPIExpectation(Files.readString(Path.of("spec", "postfach-api-facade.yaml")))
-		);
 		serviceKontoMockClient
 				.when(
 						request()