diff --git a/mozilla/mailnews/local/src/nsMailboxUrl.cpp b/mozilla/mailnews/local/src/nsMailboxUrl.cpp
index b9f1434cc19..9da58eb07fe 100644
--- a/mozilla/mailnews/local/src/nsMailboxUrl.cpp
+++ b/mozilla/mailnews/local/src/nsMailboxUrl.cpp
@@ -194,8 +194,9 @@ NS_IMETHODIMP nsMailboxUrl::GetUri(char ** aURI)
     if (filePath)
     {
       nsCAutoString baseUri;
-      nsresult rv = MsgMailboxGetURI(m_file, baseUri);
-      NS_ENSURE_SUCCESS(rv, rv);
+      // we blow off errors here so that we can open attachments
+      // in .eml files.
+      (void) MsgMailboxGetURI(m_file, baseUri);
       char * baseMessageURI;
       nsCreateLocalBaseMessageURI(baseUri.get(), &baseMessageURI);
       char * uri = nsnull;