How to install ytnef?

[Ambrogio]

Hi all,
Im' looking for a way to enable evolution with ms-tnef winmail.dat.

Searching the Web I found that a possible solution is to install ytnef.

So i tried that:

# dnf list ytnef
Last metadata expiration check: 0:06:48 ago on Wed 04 Oct 2017 10:18:41
AM CEST.
Available Packages
ytnef.x86_64                                           2.6-16.fc26     
                                       fedora

# dnf install ytnef
Last metadata expiration check: 0:08:23 ago on Wed 04 Oct 2017 10:18:41 AM CEST.
Error: 
 Problem: conflicting requests
  - nothing provides libytnef.so.0()(64bit) needed by ytnef-2.6-16.fc26.x86_64

# dnf whatprovides libytnef.so
Last metadata expiration check: 0:09:14 ago on Wed 04 Oct 2017 10:18:41 AM CEST.
Error: No Matches found

What can be wrong?

Bye
 Ambrogio