How do I open a "winmail.dat" file ?

".dat" is a data file. Adobe Reader can't open it.
More info about .dat files can be found here: http://pcsupport.about.com/od/fileextensions/f/dat-file.htm

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HT2614 Help! How do I open a winmail.dat attachment with my Mac OS 10.6.8 & Mail 4.6 (1085) Thank you.

Help! How do I open a winmail.dat attachment with my Mac OS 10.6.8 & Mail 4.6 (1085) Thank you.

Winmail. dat file is attachments sent by Microsoft mail applications (Outlook, Outlook Express or Exchange) on a proprietary format called TNEF. Being a non-standard attachment format, users from other e-mail clients (like Thunderbird or Lotus Notes) or platforms (like Android, Apple, iPad or iPhone) cannot natively read them. But you can open it easily with a winmail viewer. Go to download one and good luck!

How do you open a winmail.dat attachment on a Mac?

Having trouble opening a winmail.dat attachment sent from someone using Outlook for their mail server. Do I need a special application to open this attachment?

Winmail. dat file is attachments sent by Microsoft mail applications (Outlook, Outlook Express or Exchange) on a proprietary format called TNEF. Being a non-standard attachment format, users from other e-mail clients (like Thunderbird or Lotus Notes) or platforms (like Android, Apple, iPad or iPhone) cannot natively read them. But you can open it easily with a winmail viewer. Go to download one and good luck!

HT2614 how can I open a winmail.dat on my Mac

This is my pays stub I can open on my phone with an app but I can't print it off

See TNEF

Opening Winmail.dat files in Mail on iPad (Ms Windows Word, Excel, Ppt)

I thought I'd share my findings on what to do if your Word, Excel, Powerpoint attachments come into your Mail as winmail.dat files. In my experience I downloaded the following Apps:
Pages
Numbers
DocsToGo
WinMailViewer
Letter Opener
To open the winmail.dat file hold the icon until asked how you want to open the file: WinMailViewer or Letter Opener (assuming you've previously downloaded both Apps).
WinMailViewer is exactly what it says ... a 'viewer' of the file. The file is sent to the relevant App which you subsequently open to see a list of the files.
Letter Opener will bring up the attachment(s) in a separate window and gives you choices on which App you'd like to use to open or view the file with. Depending on what Apps you've previously downloaded:
For Excel it might list: Quick Look, DocsToGo, Csv File Editor, PDFReaderLite
For Word, it might list: Pages, DocsToGo, PDFReaderLite
DocsToGo is an excellent option for working on Word, Excel files (N.B. If you have a big Excel file with 'frozen' window panes, I recommend clicking on the 4th tool (bottom toolbar) UnFreezing the panes while you work or move around the file as I haven't figured how to work with it on!!)
Pages is the best option to use for editing Word files.
Numbers is probably the best option to use for editing Excel files.
Csv File Editor is another Excel editing option.
I hope that helps.

I should further say the files I sent are .xlsx and .docx files. They look fine my end and I send such files all the time without problems.
However, I did try to cheat by going in via the Safari onto my 'live' online email account and the Safari automatically transfers them to winmail.dat files with the same result.
Ahh - have just been on using my PC this time and you are right, it seems that the service provider does the transfer and then when my outlook opens the file (on the PC), it must reconvert to .xlsx etc again.
Very strange.
Ergo, I guess the question should be how I open wimail.dat files ??

How do you convert win mail.dat files back to MS office files?

Microsoft files (e.g. excel) when forwarded as attachments and received by MacBook Winmail, get converted to winmail.dat files. However, MS Office products cannot open these winmail.dat files. Does anyone have a solution for this "bug"?

The fault lies with Microsoft Outlook, the email client you are using on your PC. The Winmail.dat file is used to preserve Rich Text formatting. Outlook uses it when sending a Rich Text-formatted message. During transport, the content of the message may be changed, preventing the receiving client from being able to read the formatting instructions. In other cases, the receiving client does not use or recognize the winmail.dat file.
The data in a winmail.dat file is not usable (without conversion see below). To resolve this issue within Outlook, send the messages in plain text format. You can change the format of the email messages that you send from Outlook by using the following steps:
On the Tools menu, click Options, and then click Mail Format.
In Compose in this message format, click to select Plain Text, and then click OK.
Did I mention that I detest Outlook. It's not your fault. The gentlemen idiots at Microsoft make the egregious assumption that all your recipients all use Outlook, and don't adequately inform users that they have to change settings to communicate with the rest of the world.
You can also use TNEF "enough" (which is easier than getting your senders to behave LOL)
http://www.macupdate.com/app/mac/12705/tnefs-enough

How to advoid Pdf attached files turning into winmail.dat file causing incovinience opening them? And why does the phone automatically changes the file???

The first time i opened the mail, the mail loaded the attactment as pdf file and i was able to open it without any problems. But then when i tried to open it again, i watched the phone automatically turned the pdf file into winmail.dat without any of my control. Since then, i werent able to open the file anymore! And this was lucky that i was able to see it as pdf file - all other attachments i have recieved since using my new ip6 all turn into winmail.dat
this is really incovinient and frustrating for work. i cant believe i cannot just open a pdf file as a pdf file on my ip6 in the emails i recieve. I was on ip4 before this and never have anything like this happened.
Solution needed asap please.
Thankyou!

Hi Jnkm,
I'm sorry to hear you are having issues with your new iPhone 6. If you are getting a winmail.dat file instead of a PDF, you may want to see if it may be the issue noted in the following article:
iPhone, iPad, or iPod touch does not display attachment in email - Apple Support
Regards,
- Brenden

Opening winmail.dat files

How can I open winmail.dat files on a mac osx 10.4.4?
Thank you Ron

The Apple Mail Plug-in OMiC process this Microsoft Outlook winmail.dat files.

HT2614 Is there a way to open winmail.dat files on a mac pc?

aparently winmail.dat files ar created by microsft outlook or simular mail clients on a PC and has somthing to do with rich text document settings. if i start my computer in windows mode i can view the files however if i start in MAC OS and try to open it wont reconise even if using the MAC version of Microsft outlook.

That's a Microsoft extension. For frequent email senders, you can request they stop sending the Microsoft-specific stuff; messages that aren't directly readable by other mail clients. Here's how they can disable this: Email received from a sender using Outlook includes a Winmail.dat attachment (Microsoft KB278061)

Open winmail.dat files?

Anyone know how to open winmail.dat files? I've been getting email attachments which I can't open on my MBP.

Hi ,
The person that is sending you emails, has chosen in Outlook, to use the RTF format, for emailing and or specifically for emailing you. Perhaps this is default Outlook behavior at times.
This results in the winmail.dat file, which is the RTF format, of the attachments that were intended for you.
If the user would configure Outlook, to use the HTML (web) format, for emails, then you would receive the attachments as intended. As well as anybody else.
Apple mail and other mail systems, do not understand the RTF (rich text) format, and probably have to pay Microsoft licensing fees, to be able to use this format.
The options, for setting this in Outlook, differ for different versions of Outlook, but are found generally under
Tools > Address book, for setting a specific person to , use HTML format, and not RTF format, that persons email.
Also, under "Tools" > "Options", > "Mail format", for setting that all emails, will use the HTML format, instead of the RTF format.
More info
http://support.microsoft.com/kb/278061

How do I view a document sent to me in Winmail.dat(2.0MB). I have downloaded and installed the libero app butthis doesn't help me open the winmail.dat document. Help very much appreciated. THANKS JANE

How do I view a document sent to me in Winmail.dat(2.0MB). I have downloaded and installed the libero app but this doesn't help me open the winmail.dat document. Help very much appreciated. THANKS JANE

http://www.creativeinaustria.com/LetterOpenerPro?utm_source=macupdate.com&utm_me dium=referral&utm_campaign=Distribution%2BChannels
Try it
http://www.macupdate.com/app/mac/22614/letter-opener
http://www.creativeinaustria.com/LetterOpenerLite

Klammer - no permission to open winmail.dat files

Up to now I have been able to open Winmail.dat files without a problem. Suddenly I get the response "Not permitted to open the file"; When I check the file in Finder I have the rights to read and wright. Here I am stuck. Would appreciate some advice.

Try enolsoft winmail viewer. It works well for me and supports Mavericks. You can find it from Mac App Store.

All of a sudden I am receiving photos as winmail.dat files, that I cannot open. What is this, and why can't I open winmail.dat?

All of a sudden I am receiving photos as winmail.dat files that I cannot open. What is this and why can't I open them?

http://www.twistermc.com/583/open-winmaildat-files-mac/

Opening winmail.dat files on iMac

I just purchased a new iMac for home use, but I still use it quite a bit for business purposes. As such, I receive quite a few emails from Outlook users and people on Exchange servers, and consequently much of my email on the new Mac ends up as winmail.dat files or attachments. Incredibly, Apple support says that the asnwer is simply to tell all my emailers to change the way they send their mail! I can't believe that there's not a better answer or fix. Does anyone have a better solution?

Hi,
There is a solution...
http://www.creativeinaustria.com/LetterOpenerPro
http://itunes.apple.com/us/app/windat-opener/id405924251?mt=12

When jpeg's are sent as email attachments from other computers, they arrive on my imac as winmail.dat files that I can't open. What do i need to do to receive such attachments as jpegs that I can open?

When jpeg's are sent as email attachments from other computers, they arrive on my imac as winmail.dat files that I can't open. What do i need to do to receive such attachments as jpegs that I can open?

tommybwin wrote:
Perhaps go edit>attachments>always send windows-friendly attachments.
That has no effect on emails that you receive.

How do I open a "winmail.dat" file ?

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