Hi, thanks for sending on the links, that’s really helpful. I’ve fixed the issue but I found it was even more fiddly than suggested.
I changed my send-to-kindle address from john.smith@kindle.com to john.smith_new@kindle.com but I still received the verification email. It wasn’t until I changed the email to something more significantly different like jsmith22@kindle.com that the article was sent directly without verification.
Your milage may vary, but simply appending an underscore and some letters/numbers may not be enough to get around this issue.
Thanks,
Mark