One of the best solutions to transfer IMAP emails to another server is eSoftTools IMAP Backup & Migration software, which helps to backup emails of all IMAP-based applications including Gmail, Office365, Outlook.com, Yahoo, Yandex, etc. This software is developed according to the users. Moreover, it also offers a 30-day money-back guarantee if the software does not work properly. So install it now without any delay.
Read more- https://www.esofttools.com/blog/move-mail-from-one-imap-server-to-another/