Hey,
After upgrading to 5.2.7, when I create a new post, I go to Posts > Posts, check the Post I want to send notification, and click on Notification button and I receive the message that an email has been sent to the delivery queue.
But, no entry is created under Mail Activities, neither with Sent or Pending status and users don't receive any email.
Could you check this for me please?
You can test using the latest post "EGF Engefaz realiza estruturação da manute..." the integration with mailchimp is now pointing to a test list, which has just one subscriber.
Regards.