How to extract the contents of the mail about winmail.dat files?

[Olivia]

I received a lot of winmail.dat files from the senders who are using Microsoft Outlook, but I don’t know how to extract and save it, the contents is very important for me. I need them to do my works. This question has been bothering me for a long time, I am eager to solve. Does anyone know what method can I fix?

[luckman212]

Uh... I think you might be lost. You might want to try the Microsoft Outlook forums...
https://answers.microsoft.com/en-us/msoffice/forum/msoffice_outlook-mso_mac/why-doesnt-outlook-for-mac-2016-support-winmaildat/ced2b93e-d1f3-4af2-a946-87cc85990692

Try TNEFs enough
http://www.joshjacob.com/mac-development/tnef.php

[Olivia]

Thank you very much for the answer, I found a good way to solve the problem. Others have recommended an APP to me. After I used it, I can solve the problems of winmail.dat files. If anybody need help, I can tell you this app is Winmail DAT File Viewer: Open DAT,XPS,MSG files. You can find it in Mac App Store, https://itunes.apple.com/us/app/winmail-dat-file-viewer-open-dat-xps-msg-files/id1030699881?mt=12.
I hope it can help someone who like me about winmail.dat files.