Letter Opener Pro seamlessly and automatically converts winmail.dat files right inside your OS X Mail application. With Letter Opener Pro the attachments appear like any others!
With Letter Opener Lite open the occasionally winmail.dat attachment with just one double-click!
Get full-featured winmail.dat viewing power for iPhone & iPad that doesn't feel like you left some important features back at the office.
DockStar adds extra badges to Mail's dock icon and clickable indicators to the menu bar. Intuitively monitor unread messages in more than one mailbox.
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July 15, 2015
Following the release of the public beta of El Capitan, we are happy to provider our customers a beta version of Letter Opener Pro compatible with OS X El Capitan.Download Here