Email received and Email open = 0

Hello there,

I had a bit of an issue.
We create a ghost blog and activated a newsletter.
The newsletter is received, opened but the dashboad on ghost does not changes.

But the number on the top of his profil does not change as they should :

We did follow a tutorial again to activate some settings on mailgun, but still nothing.
Tutorial :

Do you have any recommandations there ?


Newsletter is sent, opened and read by the person.

What you did on mailgun also :
CNAME as been done too