thanks for your attention. Currently we are setting up a new blog. After a couple of weeks without tests, we notice that some problems. I already checked the documentation, but I didn’t find a helpful article. Maybe someone have more luck or a similar problem. After this post I will check the logs of my system. If I find something suspicious, I will update this post.
Every new subscriber gets his personal activation link. After a click on it, the new page loads and a message like: “No subscriber found” appear. I now it works a couple of weeks ago and I’m pretty sure that the provider is not the problem.
Every helpful comment is welcome.