Mailbird, Outlook , Thunderbird with some extension… I don’t think it’s necessary to mention some of them because we know that some eM Client competition can do it.
And I see that I am not the only one with this problem, since 5 years ago eM Client has not solved it. Email notification Solved - Windows 10 Forums (tenforums.com) and here a similar problem with notifications No Notifications - Mail - eM Client
You know?.. forget it, I’m sure that if I write to eM Client they will give me a better attention and a good answer.
Good day.