Are you also looking for a good solution to easily back up IMAP mails like all other users then I would recommend you to use
eSoftTools IMAP backup & migration software. It is considered to be an application program that can take instant backups of IMAP mail within a short time limit. Many more features like Naming Conventions and separate files are available in this single software. It is a completely safe and reliable software. A free demo version is also provided to the users to get complete information about it.
Read more:- Take backup & restore IMAP mail