Works fine on 20.3 Una Ci, even with Gmail and iCloud accounts. (For the complaints below: RTFM !!!)
Doesn't work with GMail or Outlook. (It still doesn't work for me... Keeps saying, "Connection failed" -- on clicking "Folders (optional)" button.) I did what you wrote but still...
https://cinnamon-spices.linuxmint.com/applets/view/244 only i know this for mail notification, you need to install mailnag sudo apt install mailnag. Work well
To deserve maximum note, there was only a lack of available in the repository the notification packets for other graphical environments besides GNOME
Mukodik, aki egy olyan programot keresett, hogy az eppen erkezo levelerol szeretne ertesitest kapni, annak ajanlom. De aki nem ul tul sokat a pc-je elott, annak az okostelefon nagyobb segitseg lehet.