Index: mimemail.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/mimemail/mimemail.inc,v
retrieving revision 1.31.2.3
diff -u -p -r1.31.2.3 mimemail.inc
--- mimemail.inc	14 Apr 2009 23:08:59 -0000	1.31.2.3
+++ mimemail.inc	10 Nov 2009 20:05:04 -0000
@@ -313,9 +313,11 @@ function mimemail_html_body($body, $subj
 
   foreach ($attachments as $a) {
     $a = (object) $a;
-    $content_type = 'multipart/mixed';
-    _mimemail_file($a->filepath, $a->filename, $a->filemime, 'attachment');
-    $parts = array_merge($parts, _mimemail_file());
+    if($a->list) {
+      $content_type = 'multipart/mixed';
+      _mimemail_file($a->filepath, $a->filename, $a->filemime, 'attachment');
+      $parts = array_merge($parts, _mimemail_file());
+    }
   }
 
   return mimemail_multipart_body($parts, "$content_type; charset=utf-8");