ZP-593 #comment Only add headers if asbody type is MIME

git-svn-id: https://z-push.org/svn/z-push/trunk@1977 b7dd7b3b-3a3c-0410-9da9-bee62a6cc5b5

src/backend/zarafa/mapiprovider.php

@@ -793,7 +793,8 @@ class MAPIProvider {
         }
 
         // OL 2013 doesn't show sender and subject for signed emails because the headers are missing
-        if(isset($message->messageclass) && strpos($message->messageclass, "IPM.Note.SMIME.MultipartSigned") === 0 ) {
+        if(isset($message->messageclass) && strpos($message->messageclass, "IPM.Note.SMIME.MultipartSigned") === 0 &&
+                isset($message->asbody->type) && $message->asbody->type == SYNC_BODYPREFERENCE_MIME) {
             ZLog::Write(LOGLEVEL_DEBUG, "Attach the transport message headers to a signed message");
             $transportHeaders = array(PR_TRANSPORT_MESSAGE_HEADERS_W);
             $messageHeaders = $this->getProps($mapimessage, $transportHeaders);