Install claws-mail-gdata-plugin by entering the following commands in the terminal:
sudo apt update sudo apt install claws-mail-gdata-plugin
Description:
Access to GData (Google services) for Claws Mail
This plugin provides access to the Google services using the GData library. . The currently implemented feature is to make your Google contacts available for automatic completion of address headers when composing a mail message.
Homepage: http://www.claws-mail.org
Version: 3.16.0-1
Section: universe/mail