diff --git a/imixs-archive-importer/src/main/java/org/imixs/archive/importer/mail/MailMessageService.java b/imixs-archive-importer/src/main/java/org/imixs/archive/importer/mail/MailMessageService.java
index 26f6332..a1decac 100644
--- a/imixs-archive-importer/src/main/java/org/imixs/archive/importer/mail/MailMessageService.java
+++ b/imixs-archive-importer/src/main/java/org/imixs/archive/importer/mail/MailMessageService.java
@@ -69,7 +69,7 @@ public void attachHTMLMessage(Message message, ItemCollection workitem) throws I
         String htmlMessage = mailConverterService.convertToHTML(message);
         if (htmlMessage != null) {
             // attache file
-            String filename = message.getSubject() + ".html";
+            String filename = resolveSubjectToFileName(message) + ".html";
             FileData fileData = new FileData(filename, htmlMessage.getBytes("UTF-8"), "text/html", null);
             workitem.addFileData(fileData);
         }