Zoho Mail doesn't enable desktop notifications by default, so you will need to visit Zoho settings to enable them.  Here's how:

  1. Login to Zoho Mail
  2. Go to Settings, and select System
  3. Turn ON notifications by using the toggle button next to Desktop Notifications.

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Now, you will receive notifications about your emails on the desktop.  They will also appear in the Wavebox Mini menu under the 'Notifications' tab.

Need more info: Visit the original Zoho help article: https://www.zoho.com/mail/help/notifications.html