diff --git a/pom.xml b/pom.xml
index 20fc6af..fad59e6 100755
--- a/pom.xml
+++ b/pom.xml
@@ -32,7 +32,7 @@
     </parent>
 
     <artifactId>oxalis-as4</artifactId>
-    <version>4.1.4</version>
+    <version>4.1.5</version>
 
     <packaging>jar</packaging>
 
diff --git a/src/main/java/no/difi/oxalis/as4/outbound/As4MessageSender.java b/src/main/java/no/difi/oxalis/as4/outbound/As4MessageSender.java
index 4aa84ff..e481215 100644
--- a/src/main/java/no/difi/oxalis/as4/outbound/As4MessageSender.java
+++ b/src/main/java/no/difi/oxalis/as4/outbound/As4MessageSender.java
@@ -49,32 +49,30 @@ public class As4MessageSender {
     public static final QName SERVICE_NAME = new QName("oxalis.difi.no/", "outbound-service");
     public static final QName PORT_NAME = new QName("oxalis.difi.no/", "port");
 
-    @Inject
-    private MessagingProvider messagingProvider;
-
-    @Inject
-    private MessageIdGenerator messageIdGenerator;
-
-    @Inject
-    private Settings<KeyStoreConf> settings;
-
-    @Inject
-    private Settings<As4Conf> as4settings;
-
-    @Inject
-    private CompressionUtil compressionUtil;
-
-    @Inject
-    private Settings<HttpConf> httpConfSettings;
-
-    @Inject
-    private TransmissionResponseConverter transmissionResponseConverter;
-
-    @Inject
-    private MerlinProvider merlinProvider;
+    private final MessagingProvider messagingProvider;
+    private final MessageIdGenerator messageIdGenerator;
+    private final Settings<KeyStoreConf> settings;
+    private final Settings<As4Conf> as4settings;
+    private final CompressionUtil compressionUtil;
+    private final Settings<HttpConf> httpConfSettings;
+    private final TransmissionResponseConverter transmissionResponseConverter;
+    private final MerlinProvider merlinProvider;
+    private final PolicyService policyService;
+    private final String browserType;
 
     @Inject
-    private PolicyService policyService;
+    public As4MessageSender(MessagingProvider messagingProvider, MessageIdGenerator messageIdGenerator, Settings<KeyStoreConf> settings, Settings<As4Conf> as4settings, CompressionUtil compressionUtil, Settings<HttpConf> httpConfSettings, TransmissionResponseConverter transmissionResponseConverter, MerlinProvider merlinProvider, PolicyService policyService, BrowserTypeProvider browserTypeProvider) {
+        this.messagingProvider = messagingProvider;
+        this.messageIdGenerator = messageIdGenerator;
+        this.settings = settings;
+        this.as4settings = as4settings;
+        this.compressionUtil = compressionUtil;
+        this.httpConfSettings = httpConfSettings;
+        this.transmissionResponseConverter = transmissionResponseConverter;
+        this.merlinProvider = merlinProvider;
+        this.policyService = policyService;
+        this.browserType = browserTypeProvider.getBrowserType();
+    }
 
     public TransmissionResponse send(TransmissionRequest request) throws OxalisAs4TransmissionException {
         try (DispatchImpl<SOAPMessage> dispatch = createDispatch(request)) {
@@ -162,6 +160,9 @@ private DispatchImpl<SOAPMessage> createDispatch(TransmissionRequest request) th
         final HTTPClientPolicy httpClientPolicy = httpConduit.getClient();
         httpClientPolicy.setConnectionTimeout(httpConfSettings.getInt(HttpConf.TIMEOUT_CONNECT));
         httpClientPolicy.setReceiveTimeout(httpConfSettings.getInt(HttpConf.TIMEOUT_READ));
+        httpClientPolicy.setAllowChunking(true);
+        httpClientPolicy.setChunkLength(8192);
+        httpClientPolicy.setBrowserType(browserType);
 
         return dispatch;
     }
diff --git a/src/main/java/no/difi/oxalis/as4/outbound/BrowserTypeProvider.java b/src/main/java/no/difi/oxalis/as4/outbound/BrowserTypeProvider.java
new file mode 100644
index 0000000..d04fc82
--- /dev/null
+++ b/src/main/java/no/difi/oxalis/as4/outbound/BrowserTypeProvider.java
@@ -0,0 +1,45 @@
+package no.difi.oxalis.as4.outbound;
+
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+import lombok.extern.slf4j.Slf4j;
+import no.difi.oxalis.as4.inbound.OxalisAS4Version;
+import no.difi.oxalis.commons.util.OxalisVersion;
+import org.bouncycastle.asn1.x500.RDN;
+import org.bouncycastle.asn1.x500.X500Name;
+import org.bouncycastle.asn1.x500.style.BCStyle;
+import org.bouncycastle.asn1.x500.style.IETFUtils;
+import org.bouncycastle.cert.jcajce.JcaX509CertificateHolder;
+
+import java.security.cert.CertificateEncodingException;
+import java.security.cert.X509Certificate;
+
+@Slf4j
+@Singleton
+public class BrowserTypeProvider {
+
+    private final X509Certificate certificate;
+
+    @Inject
+    public BrowserTypeProvider(X509Certificate certificate) {
+        this.certificate = certificate;
+    }
+
+    public String getBrowserType() {
+        return String.format("Oxalis %s / AS4 %s / %s",
+                OxalisVersion.getVersion(),
+                OxalisAS4Version.getVersion(),
+                getCN());
+    }
+
+    private String getCN() {
+        try {
+            X500Name x500name = new JcaX509CertificateHolder(certificate).getSubject();
+            RDN cn = x500name.getRDNs(BCStyle.CN)[0];
+            return IETFUtils.valueToString(cn.getFirst().getValue());
+        } catch (CertificateEncodingException e) {
+            log.warn("Could not extract CN from certificate", e);
+            return "Unknown";
+        }
+    }
+}
diff --git a/src/main/java/no/difi/oxalis/as4/util/SOAPHeaderParser.java b/src/main/java/no/difi/oxalis/as4/util/SOAPHeaderParser.java
index d370545..ceffdc8 100644
--- a/src/main/java/no/difi/oxalis/as4/util/SOAPHeaderParser.java
+++ b/src/main/java/no/difi/oxalis/as4/util/SOAPHeaderParser.java
@@ -79,7 +79,8 @@ public static X509Certificate getSenderCertificate(SOAPHeader header) throws Oxa
         if (bstNodes != null) {
             for (int i = 0; i < bstNodes.getLength(); i++) {
                 Element bstElem = (Element) bstNodes.item(i);
-                if (bstElem.getAttribute("wsu:Id").equals(refUri)) {
+
+                if (bstElem.getAttributeNS("http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd", "Id").equals(refUri)) {
                     try {
                         String pem = bstElem.getTextContent().replaceAll("[\r\n]+", "");
                         byte[] buf = Base64.getDecoder().decode(pem);