Are the messages still shown in webmail? Do you have an antivirus app that might have quarantined the Inbox? Did you click a filter button to show only unread mail, of which there is none?

no, unfortunately they are also gone in webmail. my antivirus app did not quarantine the Inbox. I did not click any filter button. I deleted "drafts" and after I had deleted "drafts" the inbox was also empty.

If the mail isn't on the IMAP server, your only recourse is to import the mail from a profile or mail backup, if you have one.

This question has been locked because the original author has deleted their account. While you can no longer post new replies, the existing content remains available for reference.