Il giorno gio, 12/12/2019 alle 16.03 +0000, Patrick O'Callaghan ha scritto:
You may get better answers by asking on the Evolution list. 

I'm sorry, (and I could be wrong) but this is a Fedora question&answer:

From fedora's evolution.spec file, get from evolution-3.35.2-1.fc32.src.rpm:

%cmake -G "Unix Makefiles" \
	-DENABLE_MAINTAINER_MODE=OFF \
	-DVERSION_SUBSTRING=" (%{version}-%{release})" \
	%ldap_flags %ssl_flags %gtkdoc_flags %tests_flags \
	-DENABLE_PLUGINS=all \
	-DENABLE_YTNEF=OFF \
	..

Like you can see, TNEF is OFF.

If the vulnerability or bug still exist, this is right.

But if it is true that the bug or vulnerability has been solved, it's time to remove " -DENABLE_YTNEF=OFF" line from .spec file.

Can Milan Crha <mcrha at redhat.com>  evaluate this and give us some answers? (thanks in advance)

For now, I have resolve this Issue (cannot open the winmail.dat attach) with this simple bash script, put it in my ~/bin/ folder and bind it to "open with" .dat file into file manager:

#!/usr/bin/bash
filefullpath="$1"
tmpdir=$(mktemp -d "/var/tmp/tnef.XXXXXXXX.d")
tnef --verbose --save-body -C "$tmpdir" "$filefullpath"
xdg-open "$tmpdir"

Thanks

-- 
Dario Lesca
(inviato dal mio Linux Fedora 31 Workstation)