http://toms-cafe.de/vdr/download/mailbox-0.4.0-1.5.3.diff

--- mailbox-0.4.0/AxMailWrapper.cpp
+++ mailbox-0.4.0/AxMailWrapper.cpp
@@ -578,7 +578,11 @@ AxMailWrapper::LineCltn AxMailWrapper::g
 
       //----- convert to OSD-CharSet -----
       Ax::Mail::Tools::map2CharSet( aStr, thePart->getParam("charset")
+#if APIVERSNUM >= 10503
+                                  , aStr, cCharSetConv::SystemCharacterTable()
+#else
                                   , aStr, I18nCharSets()[Setup.OSDLanguage]
+#endif
                                   );
 
       //----- do formatting---------------
--- mailbox-0.4.0/AxMenuMailListView.cpp
+++ mailbox-0.4.0/AxMenuMailListView.cpp
@@ -149,7 +149,11 @@ void AxMailItem::createCacheValues()
 {
   if (mySubject.empty())
   {
+#if APIVERSNUM >= 10503
+    if (!Ax::Mail::Tools::decodeEncodedWords(myMail->getSubject(), mySubject, cCharSetConv::SystemCharacterTable(), true))
+#else
     if (!Ax::Mail::Tools::decodeEncodedWords(myMail->getSubject(), mySubject, I18nCharSets()[Setup.OSDLanguage], true))
+#endif
     {
       wswarn(("AxMailItem::AxMailItem() unable to decode subject line '%s'", mySubject.c_str()));
     } // if
@@ -157,7 +161,11 @@ void AxMailItem::createCacheValues()
 
   if (myFrom.empty())
   {
+#if APIVERSNUM >= 10503
+    if (!Ax::Mail::Tools::decodeEncodedWords(myMail->getFrom(), myFrom, cCharSetConv::SystemCharacterTable(), true))
+#else
     if (!Ax::Mail::Tools::decodeEncodedWords(myMail->getFrom(), myFrom, I18nCharSets()[Setup.OSDLanguage], true))
+#endif
     {
       wswarn(("AxMailItem::AxMailItem() unable to decode from line '%s'", myFrom.c_str()));
     } // if
--- mailbox-0.4.0/AxMenuMailView.cpp
+++ mailbox-0.4.0/AxMenuMailView.cpp
@@ -325,14 +325,22 @@ void AxMenuMailView::updateWithCurrentMa
     std::string aText;
 
     //----- Subject: --------------------------------------------------------
+#if APIVERSNUM >= 10503
+    if (!Ax::Mail::Tools::decodeEncodedWords(aMail->getSubject(), aText, cCharSetConv::SystemCharacterTable(), true))
+#else
     if (!Ax::Mail::Tools::decodeEncodedWords(aMail->getSubject(), aText, I18nCharSets()[Setup.OSDLanguage], true))
+#endif
     {
       wswarn(("AxMenuMailView::updateWithCurrentMail() unable to decode subject line '%s'", aText.c_str()));
     } // if
     myBodyText += string(tr("Subject")) + ":\t " + aText + "\n";
 
     //----- From: ------------------------------------------------------------
+#if APIVERSNUM >= 10503
+    if (!Ax::Mail::Tools::decodeEncodedWords(aMail->getFrom(), aText, cCharSetConv::SystemCharacterTable(), true))
+#else
     if (!Ax::Mail::Tools::decodeEncodedWords(aMail->getFrom(), aText, I18nCharSets()[Setup.OSDLanguage], true))
+#endif
     {
       wswarn(("AxMenuMailView::updateWithCurrentMail() unable to decode from line '%s'", aText.c_str()));
     } // if