I couldnt open a support ticket. So I will try it here. I saw that Mailjet is supported by the Newsletter Plugin, so I changed my Maildelivery Service to Mailjet.
How can I be absolutly sure, that the connection to the Newsletter Plugin is perfectly installed? I am not a technique pro.
When the connection is not set correctly and the Newsletter Plugin will send all the Email with my Domainprovider and Hostservice, they will restrict and delete my Service their.
So how can I check if the Newsletter Plugin in Mailjet work together proberly? Because when I get new Newsletter Subscribers, the Lists is not synchronized with Mailjet. How can I fix that?