Just keep in mind that by using them, you are enabling these services to view the contents of your eMail and it’s attachments, so you are willingly giving up your privacy in suing them. There are FREE services available online also, that will convert your windmill.dat for you instantly. If you also need a winmail.dat unpacker-app for your iPhone and/or iPad, you can consider this one :
#Winmail dat reader for iphone mac
If you prefer an automatically updated app from the Mac App Store, and don’t mind paying for it, consider this one, which will unpack faster and has a more comprehensive and visually nicer interface :
#Winmail dat reader for iphone free
Too bad, there are no free apps for this in the App Store, but there is a FREE one available here : More info can be found on Microsoft’s website :Įven though prevention is the better option, there are alternatives : if you are a recipient using OSX, you can find various apps to unpack winmail.dat files in the Mac App Store. In Outlook’s Address Book, double-click on the recipient’s eMail-address, then in the “SMTP – Address” field choose delete (un-click) the check-mark at “Always Send To This Recipient iIn Microsoft Exchange Rich-Text Format”, then click “OK” set Outlook to only send ‘Plain Text’-eMail to this specific recipient : In Outlook, choose “File” (or “Tools”), then “Options”, then “Mail” (or “Mail Format”), and then in “Compose in this message format”, choose “Plain Text”, then click “OK”Ģ. set Outlook to only send ‘Plain Text’-eMail to any future recipient : Microsoft provides 2 options for the sender who wants to prevent this :ġ. …but for most non-Outlook users, using Outlook is not an option…Īnyway… the solution …or rather the various options for solving this, as either the sender can prevent this from happening, or the recipient can find ways to open the windmill.dat file anyway : So… this is not a Mac-problem, it isn’t even a problem for all non-Outlook users, it is just that the only way to prevent this from happening to you, is to use MS Outlook…
All receivers of the eMail that use Outlook (or MS Exchange) will not detect any irregularity, but any recipient who’s not using Outlook as their eMail-client will receive it as a text-eMail with only one attachment : a winmail.dat file. Sometimes (in the chain of eMail-servers involved in eMail-communication) the sender’s Outlook-app (or MS Exchange client) sends out a TNEF-eMail, not a regular HTML-eMail. So, even though Outlook calls them HTML-eMail, they are actually being sent as TNEF-eMail, which is HTML-ish, but still MS Outlook-only… MS Outlook never fully adopted regular HTML as it’s eMail-layout protocol. HTML (the web-layout protocol) was adopted as the industry-wide standard. But TNEF never made it into an eMail-communication industry standard. Microsoft then developed TNEF as a protocol for communication between their Outlook eMail-clients. Long ago, when eMails were still text-only without layout and attachments were added as plain files, a lot of eMail-client makers wanted to improve their user experience and provide their users a layout-option for eMails. (or rather : ‘handling this’, as fixing the actual cause isn’t something an end user can do)īut first, a little insight into the cause : When I try to open it, OSX tells me there is no app on my Mac that can handle this file. The program features a clean and simple user interface.I recently received an eMail that should include various attachments, but it only included one : a winmail.dat file.The program is light on system resources and free.A special application, such as Winmail.dat Reader, is required to open and read these files. An iOS device will not use that filename for an attachment of its own accord. If you receive an attachment with that filename, the issue lay squarely with the sender. These files can't be read by users from other platforms (Apple, Android) or e-mail clients, such as Lotus Notes, Thunderbird, etc. Its worth mentioning that the attachment name winmail.dat is an Outlook construct and has nothing whatsoever to do with the receivers operating system or mail application. Winmail.dat files represent are in fact TNEF attachments sent by various e-mail clients and applications, such as MS Exchange, MS Outlook and Outlook Express. Users with other e-mail clients (like Thunderbird or. The application will let you see the original message body and subject, as well. Winmail.dat or ATT0001.dat attachments are TNEF encoded files sent by Microsoft Outlook and Exchange. The program comes with a friendly and clutter-free interface, allowing even novice users to process and handle their files with minimum effort. Winmail.dat Reader is a simple and lightweight application which offers you the possibility to easily and quickly open, save and convert files on winmail.dat email attachments sent by MS Exchange and Outlook.
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