Monitors mailboxes for new mail.
http://www.geckoblu.net/html/mailindicator.html
sudo aptitude install python3-lxml python3-xdg python3-feedparser libnotify4
mkdir -p ~/.config/mailindicator cp ~/soft/ubuntu-install/installation-22.04/data/configuration_backup/user/mailindicator/config.xml ~/.config/mailindicator/
sudo aptitude install python3-setuptools build-essential devscripts debhelper dh-python
debuild -us -uc
Reference: Use stdeb to make Debian packages for a Python package
sudo aptitude install python3-stdeb fakeroot dh-python build-essential
python3 setup.py --command-packages=stdeb.command bdist_deb
Use stdeb to make Debian packages for a Python package Packaging Python programs - DEB (and RPM) packages