So changed my email address and set it up with K9. I deleted my old email address and so I only have one email address setup on K9.
When I get a new email to my new address, it shows up in my inbox. However, after I read it and close out of K9, the email completely disappears. It is no longer found in my inbox, trash or anywhere in the app. It is just gone. No. I am no deleting them. I want to keep the emails. They are important.
This never happened with my old Gmail account which was set up exactly the same (pop3).