Install syncmaildir-applet by entering the following commands in the terminal:
sudo apt update sudo apt install syncmaildir-applet
Description:
mailbox synchronization tools - GNOME applet
Sync Mail Dir is a set of utilities to synchronize a pair of mailboxes in Maildir format, using SSH to transfer data. . This package provides an applet that integrates smd-loop with GNOME; that is, it notifies the user with popups, starts smd-loop when the user logs in, and provides a simple user interface to deal with synchronization errors.
Homepage: http://syncmaildir.sourceforge.net
Version: 1.3.0-1
Section: universe/mail