Install claws-mail-pdf-viewer by entering the following commands in the terminal:
sudo apt update sudo apt install claws-mail-pdf-viewer
Description:
PDF and PostScript attachment viewer for Claws Mail
This plugin allows Claws Mail to view PDF and PostScript files attached to mails in the message window. . PostScript requires 'gs' tool to be available for conversion, otherwise plugin will only be able to display PDF attachments.
Homepage: http://www.claws-mail.org
Version: 3.16.0-1
Section: universe/mail