Good afternoon,
Until last week, using Debian Stretch with MATE, I used mail-notification to inform me of the arrival of new emails without having to have thunderbird open.
Last Wednesday I updated to Debian BUSTER and "mail-notification" is no longer in the repositories, try to install other notifiers like mailnag, Bubblemail, gnubiff and others.
After correctly setting the POP server, user, password and port
none of them removes the notification, I am convinced that I am not installing something related to notifications, install
gnome-tweak-ools and gnome-shell-extensions
but no warning appears either.

can someone guide me????

Thanks a lot