Hi, Whenever I send e-mail to my friend (external company) he gets winmail.dat attachment. My mail server is Exchange 2003 and 2007, and his mailbox is on Lotus server. Where is the problem - on my or his site? Thnx.

Hello Jack, This issue is caused by the problematic mails format: Rich Text Formatting (RTF). You can use HTML or Plain text to compose emails. The issue will not happened. For more information: Winmail.dat attachments are included in received e-mail messages in Outlook http://support.microsoft.com/kb/278061 XADM: Winmail.dat Attached to All Internet Messages Regardless of Setting on Client http://support.microsoft.com/kb/257800 Please note the articles are also fit for your situation. Thank you, Elvis

Hi, Thnx for your answer but problem is only with Lotus user. When I send him mail with attachment (plain text, HTM, rich text) he always gets winmail.dat attachment. What could be a problem? My Exchange server (or Outlook) or his Lotus Domino/Notes? When checked http://support.microsoft.com/kb/257800, Ive specified Determine by individual user settings. Thnx for your help.