Install claws-mail-tnef-parser by entering the following commands in the terminal:
sudo apt update sudo apt install claws-mail-tnef-parser
Description:
TNEF attachment handler for Claws Mail
This plugin for Claws Mail allows reading of application/ms-tnef attachments. These attachments usually come from Microsoft mailers with the name 'winmail.dat'.
Homepage: http://www.claws-mail.org
Version: 3.16.0-1
Section: universe/mail