Comment to 'Problem with email notifications'
  • "sometimes in Studio you can see exclamation mark near some type of notifications, then you need disable it and enable again"
    - I don't understand what you mean. Anyway I did not find any exclamation point in any notification.

    It's in Studio > Notifications and looks like this:

    "check if your email is unsubscribed or blacklisted in your SMTP service"
    - Where do I have to see this?

    All SMTP services are different? so I can point you in some particular place, you can see activity log maybe it will shed some light on why emails aren't sending also it should somewhere block lists and unsubscribed users too.