The close button should minimize eM Client

I don’t now if this options exits in eM Client but I would like the eM Client can do this like Spotify. In the task bar, don’t show the icon like Task Switcher too and the program run in second plane.
I don’t know if this option comes out in eM Client, but I would like eM Client to be able to do this like Spotify. In the taskbar, it doesn’t show the icon and the task switcher either, and the program runs in the background.

The close button should minimize eM Client.

You can set eM Client in “Menu / Settings” to “Close to tray” but "not close to the Taskbar.

To show eM Client icon in the Windows tray to see email notifications see the following thread.