It looks like the Email Server is saving collected emails to the wrong mailbox. Whats going on here?
Emails have a real recipient address, which may not be listed in the To or CC field. For example it’s possible to send an email to email@example.com while setting the To field in the Email to firstname.lastname@example.org. You can check this by looking in the Email Full Header, and you’ll see something like the following, where this email was actually sent to fred@example.