[tdonline]

Originally Posted by gbm

I would suggest logging in to your gmx email account and creating an Alias email address to use just for calibre.

https://www.gmx.com/mail/alias-addresses/

bernie

Simple solution that fixed the problem immediately. It was so frustrating having to deal with Amazon. They have no idea of this quirk.

I created an alias email address that is far different to the email address for my Amazon account and that did the trick.