Install libconvert-tnef-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libconvert-tnef-perl
Description:
Perl module to read TNEF files
TNEF stands for Transport Neutral Encapsulation Format, and if you've ever been unfortunate enough to receive one of these files as an email attachment, you may want to use this module.
Homepage: http://search.cpan.org/dist/Convert-TNEF/
Version: 0.18-1
Section: perl