If you want to import your MBOX Email files to IMAP server then you can use
eSoftTools MBOX Converter Software. This software converts all databases of MBOX to IMAP Accounts swiftly. It is very easy to use and converts MBOX files to PST and other many formats such as YahooMail, Gmail, Office 365, HTML, MSG, EML, etc. other formats for free. It can support all email clients including Thunderbird, Opera Mail, Apple Mail, Seabird, SeaMonkey, Eudora, Entourage, etc. This software shows a live preview of all emails before migrating MBOX to IMAP Account. provides a free demo version to all users and converts 25+ items of MBOX files to IMAP account for free.
Click here:- Import MBOX to IMAP server