Easy Winmail Reader is an app that lets you extract winmail.dat attachments. Almost every Mac user would have at least a friend or two using Microsoft Outlook. And these people may send across email attachments using winmail.dat that cannot be opened with the built-in OS X app. Microsoft Outlook for Windows pushes email messages as TNEF. The majority of other email programs do not understand or work with TNEF. Thankfully, Easy Winmail Reader is there to bridge this gap. Also, Easy Winmail Reader lets you save one attachment or all at one go. And to download the files in your location of choice, you just have to drag and drop the files there.