Import MBOX files into Yahoo Mail, or export MBOX emails to Gmail, Office 365, and Yahoo Mail using the
eSoftTools MBOX Converter—a tool already trusted by many users who have achieved excellent results. It offers the facility to preview MBOX emails before finalizing the actual conversion process. The tool is very easy to download and use, and a free demo version is also available for anyone to try at no cost.
Read More:- Import MBOX File into Yahoo Mail