IPM.Microsoft Mail.Read Receipt

[Onelli74]

• I am running the latest version
• I checked the documentation and found no answer
• I checked to make sure that this issue has not already been filed
• I have read the FAQ (https://github.com/TB-throwback/LookOut-fix-version/wiki/F.A.Q.)

Context

• Operating System: Windows 10 21H1
• Thunderbird version number: 91.11.0
• 64 bit
• LookOut (fix version) version number: 5.2

Expected Behavior

In read-receipt Outlook attaches a base64 encoded winmail.dat, type "IPM.Microsoft Mail.Read Receipt", that's not read even by online winmail.dat translators; once opened in Outlook it says that the message, sent to xyz with subject zxy in date yzx, has been read in date zyx. Thunderbird should display that information.

Current Behavior

Empty message.

Steps to Reproduce

1. open the attached .eml file (renamed in .eml.txt to get uploaded to github)
2. file is empty
3. open the attached .txt file: it is the output from Outlook (Italian language), it says that the message, sent to xyz with subject zxy in date yzx, has been read in date zyx.

Thank you!
Matteo

Outlook Return Receipt - 1.eml.txt
Outlook Return Receipt - 1.txt

[dugite-code]

This looks to be an unhandled TNEF attribute that's causing the checksum validation to fail. Unfortunately this may not be a simple fix as I believe it will need an extension in tnef.js

I did find mention of it on another project: https://sourceforge.net/p/ytnef/discussion/239391/thread/dc445d65/