SysInspire MBOX Converter can convert MBOX files of any size into Unicode PST, with no size restriction, while preserving all email properties. Try the free demo version.

With this software, you can not only fix mbox file errors, but also convert mbox files from various clients such as Thunderbird, Pocomail, and Applemail, among others. Additionally, it is capable of converting mbox/mbs/sbd/mbx file emails into a single working pst file, as well as other formats such as EML, EMLX, MSG, HTML, and NSF.
Not sure if this software is right for you? Try out the free demo version to export 25 items of mailbox from each folder, and experience its full functionality for yourself. If you decide to upgrade to the premium version, there is no space limit, meaning you can convert any size of mbox file into a Unicode pst file. Plus, if you are not completely satisfied with the software's performance, you can take advantage of the 30-day money back guarantee to get your payment refunded.
Overall, Sysinspire's MBOX to PST Converter is an excellent choice for anyone seeking a reliable and efficient software for mbox file conversion. Don't wait - download it today!
Version 2.5: Newly launched SysInspire MBOX Converter software