On Tue, Nov 9, 2021 at 12:21 PM, Mark Fletcher wrote:
It's a MIME format message segment. I don't think anybody drops it. Outside of Microsoft, there's also not much support for it.
Here's some background info from Mozilla.
I work on KDE's email software. There's a program that is supposed to handle these attachments, but I've never been able to make it work.
FWIW, my group generates 300 - 400 messages per month, and I moderate all attachments. I have never seen a winmail.dat atttachment in the moderation queue. I have seen a lot of attachments on messages composed by Mail for Windows 10, but those have all been small .png images (a dot, or a line). I tell my members when I see these, and most people have been able to correct the misconfiguration without a lot of help.
Canyon Lake, Texas