Email Setup Confirmation + Tracking Not Working Help

Im trying to get email tracking working in my Ghost setup (4.3.3).
I have the following settings:

  • Ghost: Enable newsletter open-rate analytics: Enabled
  • Ghost Settings:
mail__transport="SMTP"
mail__from="postmaster@mg.packetcoders.io"
mail__options__service="Mailgun"
mail__options__auth__user="postmaster@mg.packetcoders.io"
mail__options__auth__pass="####"
mail__options__host="smtp.eu.mailgun.org"
mail__options__port="587"
mail__options__secureConnection="false"

Is there anything wrong with my settings. Also, do I need all the mail settings in Ghost if I have my API key set in my dashboard?

Many Thanks,