[Gerard T]

Hi!
I had the same issue. Since I suspected the problem had something to do with a kind of incompatibility with GMX, I logged in my account there in my browser. There were new terms of use to be accepted, so I did it. After it, I tried to send the ebook I was attempting to before, and surprisingly the task was complete. No errors.
But now I have another issue: even there was seemingly no error in the task manager of calibre, the ebook does not reach my Kindle at all. Also, I got an email from Amazon at GMX saying there was an error while sending the ebook. The file format is compatible (epub). I wonder if this only happens to me.
Greetings,
Gerard.