Mail.app opens spontaneously. Not on startup, but during my work. Even if i don't touch keyboard or mouse mail.app can open a half window.

I'm working with IDE in fullscreen mode and Mail.app splits screen spontaneously.

Is there a way to detect, who is opening Mail.app?

  • 1
    Which version of macOS are you using? Can you try booting into Safe Mode (hold Shift while booting) to see if there's possibly some conflicting software?
    – Allan
    Commented Jan 3, 2019 at 14:25
  • 1
    Latest. Can't test it in safe mode as it happens rearly. Commented Jan 4, 2019 at 16:48
  • For me, it happens whenever mail looses connection with the google servers. No idea why it happens...
    – user260616
    Commented Aug 3, 2019 at 15:04

1 Answer 1


I found that this worked for some users:

Open and login to Google Calendar (https://calendar.google.com)

Select the Setting gear icon (upper right-hand corner), then select “Setting” from the pull-down menu

Below the “Calendar Settings” header select the Calendars link

To the right of the calendar name under NOTIFICATIONS, select Edit notifications

There are five options in the section “Choose how you would like to be kept up-to-date:” - remove all of the checkmarks under the Email column

Click the “Save” button at the bottom of the page

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