diff --git a/objecttreeparser.cpp b/objecttreeparser.cpp
index 84848339c..df7257a56 100644
--- a/objecttreeparser.cpp
+++ b/objecttreeparser.cpp
@@ -112,7 +112,7 @@ using KPIMUtils::LinkLocator;
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
-#include <memory>
+#include <cassert>
 #include "chiasmuskeyselector.h"
 
 namespace KMail {
@@ -654,6 +654,25 @@ namespace KMail {
     return bIsOpaqueSigned;
   }
 
+void ObjectTreeParser::writeDecryptionInProgressBlock()
+{
+  kDebug(5006) << k_funcinfo << endl;
+  assert( mReader );
+  // PENDING(marc) find an animated icon here:
+  //const QString iconName = KGlobal::instance()->iconLoader()->iconPath( "decrypted", KIcon::Small );
+  const QString decryptedData = i18n("Encrypted data not shown");
+  PartMetaData messagePart;
+  messagePart.isDecryptable = true;
+  messagePart.isEncrypted = true;
+  messagePart.isSigned = false;
+  messagePart.inProgress = true;
+  htmlWriter()->queue( writeSigstatHeader( messagePart,
+                                           cryptoProtocol(),
+                                           QString() ) );
+  //htmlWriter()->queue( decryptedData );
+  htmlWriter()->queue( writeSigstatFooter( messagePart ) );
+}
+
 void ObjectTreeParser::writeDeferredDecryptionBlock()
 {
   kDebug();
@@ -1568,14 +1587,13 @@ namespace KMail {
       }
       htmlWriter()->queue( "<b>" + i18n( "Certificate import details:" ) + "</b><br>" );
       for ( std::vector<GpgME::Import>::const_iterator it = imports.begin() ; it != imports.end() ; ++it ) {
-        if ( (*it).error() )
+        if ( (*it).error() ) {
           htmlWriter()->queue( i18nc( "Certificate import failed.", "Failed: %1 (%2)", (*it).fingerprint(),
-                                 QString::fromLocal8Bit( (*it).error().asString() ) ) );
-        else if ( (*it).status() & ~GpgME::Import::ContainedSecretKey ) {
+                                     QString::fromLocal8Bit( (*it).error().asString() ) ) );
+        } else if ( (*it).status() & ~GpgME::Import::ContainedSecretKey ) {
           if ( (*it).status() & GpgME::Import::ContainedSecretKey ) {
             htmlWriter()->queue( i18n( "New or changed: %1 (secret key available)", (*it).fingerprint() ) );
-          }
-          else {
+          } else {
             htmlWriter()->queue( i18n( "New or changed: %1", (*it).fingerprint() ) );
           }
         }
@@ -2201,42 +2219,51 @@ QString ObjectTreeParser::writeSigstatHeader( PartMetaData & block,
                                               const QString & fromAddress,
                                               const QString & filename )
 {
-    const bool isSMIME = cryptProto && ( cryptProto == Kleo::CryptoBackendFactory::instance()->smime() );
-    QString signer = block.signer;
+  const bool isSMIME = cryptProto && ( cryptProto == Kleo::CryptoBackendFactory::instance()->smime() );
+  QString signer = block.signer;
 
-    QString htmlStr, simpleHtmlStr;
-    QString dir = ( QApplication::isRightToLeft() ? "rtl" : "ltr" );
-    QString cellPadding("cellpadding=\"1\"");
+  QString htmlStr, simpleHtmlStr;
+  QString dir = ( QApplication::isRightToLeft() ? "rtl" : "ltr" );
+  QString cellPadding("cellpadding=\"1\"");
+
+  if ( block.isEncapsulatedRfc822Message ) {
+    htmlStr += "<table cellspacing=\"1\" "+cellPadding+" class=\"rfc822\">"
+               "<tr class=\"rfc822H\"><td dir=\"" + dir + "\">";
+    if ( !filename.isEmpty() ) {
+      htmlStr += "<a href=\"" + QString("file:") +
+        KUrl::toPercentEncoding( filename ) + "\">" +
+        i18n("Encapsulated message") + "</a>";
+    } else {
+      htmlStr += i18n("Encapsulated message");
+    }
+    htmlStr += "</td></tr><tr class=\"rfc822B\"><td>";
+  }
 
-    if( block.isEncapsulatedRfc822Message )
-    {
-        htmlStr += "<table cellspacing=\"1\" "+cellPadding+" class=\"rfc822\">"
-            "<tr class=\"rfc822H\"><td dir=\"" + dir + "\">";
-        if( !filename.isEmpty() )
-            htmlStr += "<a href=\"" + QString("file:")
-                     + KUrl::toPercentEncoding( filename ) + "\">"
-                     + i18n("Encapsulated message") + "</a>";
-        else
-            htmlStr += i18n("Encapsulated message");
-        htmlStr += "</td></tr><tr class=\"rfc822B\"><td>";
+  if ( block.isEncrypted ) {
+    htmlStr += "<table cellspacing=\"1\" "+cellPadding+" class=\"encr\">"
+               "<tr class=\"encrH\"><td dir=\"" + dir + "\">";
+    if ( block.inProgress ) {
+      htmlStr += i18n("Please wait while the message is being decrypted...");
+    } else if ( block.isDecryptable ) {
+      htmlStr += i18n("Encrypted message");
+    } else {
+      htmlStr += i18n("Encrypted message (decryption not possible)");
+      if( !block.errorText.isEmpty() )
+        htmlStr += "<br />" + i18n("Reason: %1", block.errorText );
     }
+    htmlStr += "</td></tr><tr class=\"encrB\"><td>";
+  }
 
-    if( block.isEncrypted )
-    {
-        htmlStr += "<table cellspacing=\"1\" "+cellPadding+" class=\"encr\">"
-            "<tr class=\"encrH\"><td dir=\"" + dir + "\">";
-        if( block.isDecryptable )
-            htmlStr += i18n("Encrypted message");
-        else {
-            htmlStr += i18n("Encrypted message (decryption not possible)");
-            if( !block.errorText.isEmpty() )
-                htmlStr += "<br />" + i18n("Reason: %1", block.errorText );
-        }
-        htmlStr += "</td></tr><tr class=\"encrB\"><td>";
+    if ( block.isSigned && block.inProgress ) {
+      block.signClass = "signInProgress";
+      htmlStr += "<table cellspacing=\"1\" "+cellPadding+" class=\"signInProgress\">"
+        "<tr class=\"signInProgressH\"><td dir=\"" + dir + "\">";
+      htmlStr += i18n("Please wait while the signature is being verified...");
+      htmlStr += "</td></tr><tr class=\"signInProgressB\"><td>";
     }
     simpleHtmlStr = htmlStr;
 
-    if( block.isSigned ) {
+    if ( block.isSigned && !block.inProgress ) {
         QStringList& blockAddrs( block.signerMailAddresses );
         // note: At the moment frameColor and showKeyInfos are
         //       used for CMS only but not for PGP signatures
diff --git a/objecttreeparser.h b/objecttreeparser.h
index 8e99883f2..7e2552681 100644
--- a/objecttreeparser.h
+++ b/objecttreeparser.h
@@ -194,6 +194,10 @@ namespace KMail {
         but we're deferring decryption for later. */
     void writeDeferredDecryptionBlock();
 
+    /** Writes out the block that we use when the node is encrypted,
+        but we've just kicked off async decryption. */
+    void writeDecryptionInProgressBlock();
+
     /** Returns the contents of the given multipart/encrypted
         object. Data is decypted.  May contain body parts. */
     bool okDecryptMIME( partNode& data,
diff --git a/partmetadata.h b/partmetadata.h
index b22b0b90a..3b6c2befe 100644
--- a/partmetadata.h
+++ b/partmetadata.h
@@ -34,6 +34,7 @@ namespace KMail {
         isGoodSignature( false ),
         isEncrypted( false ),
         isDecryptable( false ),
+        inProgress( false ),
         technicalProblem( false ),
         isEncapsulatedRfc822Message( false )
     {
@@ -55,6 +56,7 @@ namespace KMail {
     bool isGoodSignature : 1;
     bool isEncrypted : 1;
     bool isDecryptable : 1;
+    bool inProgress : 1;
     bool technicalProblem : 1;
     bool isEncapsulatedRfc822Message : 1;
   };