I’ve configured Mailgun with my Ghost Installation by entering Mailgun Domain and Private API Key.
The new member signup flow works smoothly. It sends the verification email to those who enter their email on the subscription page and if they click on the verification link, the email gets added as a member in Ghost.
But when I draft a new post and try to use the email newsletter feature, I get the following in spite of proper configuration with Mailgun.
Also when I publish a new post, the subscribed members do not get any email of newly published posts.