I have a client who uses Outlook 2010 and upon sending PDF attachments to several recipients, the recipients only get a winmail.dat attachment. The standard fix from MS is to use plain text format. This does work for some recipients, however the client claims Mac recipients still get the error regardless of message format. Unfortunately, the client uses stationary with company logos, etc. and refuses to use plain text for official business. So far, I have not been able to resolve the issue.
Any help is greatly appreciated!