You can try the
EML to MBOX Converter tool for your EML files migration. It's an advanced tool that can transfer your whole data at the same time without making an error in your documents. The EML to MBOX software is advanced tool that can smoothly work on all the latest versions of Windows like XP/Vista/10/8.1/8 (32 + 64 bit).
Visit here:-
https://www.wholeclear.com/eml/mbox/