I have a single user in our organization that is RECEIVING WINMAIL.DAT attachments which contain PDF's from only one or two domains external to the organization.Let me be clear that he is not sending out WINMAIL.DAT attachments to anyone. I have tested sending him RTF emails with a PDF attachment from an external address and he is receiving them just fine. We are running two Exchange 2013 servers in HA configuration and this user is using Outlook 2010 for his email client. If he looks at these messages in OWA, they still have the WINMAIL.DAT attachment within OWA. I cannot find an answer for this anywhere, and this is not related to disabling TNEF on our exchange servers. Does anyone have any ideas? I would really appreciate the assistance.
Thanks,
Dean