Open Winmail.Dat on Mac

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Occasionally I receive a winmail.dat file. How can I open that on a Mac? I tried opening my Mail in Outlook. That didn’t work.

Thanks!

Nathan Parker

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Nathan Parker wrote:

winmail.dat

https://www.winmaildat.com/

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Nathan Parker

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Nathan,

https://osxdaily.com/2016/04/19/open-winmail-dat-file-mac-os-x/

This is about two years old, so probably is still OK. The free application mentioned as one of the ways to open “.dat” emails might, or might not be 64 bit, so people running Catalina might or might not be able to use it. But the other methods look OK to me.

The comments to the article look interesting too. Good luck.

Ex-Windows user (Win. 98, XP, 7); since mid-2017 using also macOS. Presently on Monterey 12.15 & sometimes running also Linux (Mint).

MacBook Pro circa mid-2015, 15" display, with 16GB 1600 GHz DDR3 RAM, 1 TB SSD, a Haswell architecture Intel CPU with 4 Cores and 8 Threads model i7-4870HQ @ 2.50GHz.
Intel Iris Pro GPU with Built-in Bus, VRAM 1.5 GB, Display 2880 x 1800 Retina, 24-Bit color.
macOS Monterey; browsers: Waterfox "Current", Vivaldi and (now and then) Chrome; security apps. Intego AV

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Nathan Parker

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Thanks! I tried the THEF’s Enough app since it says it’s updated for Catalina, so I know it’ll work when I upgrade to Catalina. So far so good. Thanks again!

Nathan Parker

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In my experience, if you send an email with an attachment, the receiver may see a winmail.dat attachment instead of the actual attachment.  In my case, it was because the sender was inadvertently sending the mail in Rich Text format.  Once the sender was shown how to use HTML format instead, the receivers could see the correct attachment, not winmail.dat.

Windows 10 Pro 64 bit 20H2

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Nathan Parker

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Yeah, it’s mainly sales quote emails from one of my tech gear sales reps I have this happen. When they send me the quotes, it attaches as a winmail.dat file.

Nathan Parker

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It’s not just attachments.  The receiver can get a winmail.dat file if the text contains formatting which the receiving email client cannot interpret.  Again, the solution is to ensure that messages are sent in HTML format (or Plain Text).

Windows 10 Pro 64 bit 20H2

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Nathan Parker

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[access-mdb]

I’ve used this site to open winmail.dat files in the past. Can’t vouch for it now as I’ve not used it for a while.

Eliminate spare time: start programming PowerShell

• This reply was modified 5 years ago by access-mdb. Reason: Helps to add the link!

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Nathan Parker

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