You can backup IMAP emails with this simple IMAP backup tool Mail backup X is a certified IMAP backup tool that helps you backup all types of email data regardless of your experience. Once you have tested this method, you are going to feel totally confident about your email backup and archiving process.
Here is what you need to do to backup any IMAP application. Launch Mail backup X and click on Setup a new backup profile
Click on Email server to move forward