I have a user using Outlook 98. When she sends an attachement to someone using Outlook Express, sometimes it does not work. It just says [[ filename.ext : 3847 in winmail.dat ]] intead of actually attaching the file. However, it works fine when sent to a user using regular MS Outlook. And other users using Outlook can even forward the message with the attached file to a user using Outlook Express and it will work fine. I have narrowed it down to a problem between Outlook on the sending users computer and Outlook Express. I have no idea how to fix it though. Any ideas?