You can use the best MSG Converter tool, MacProTools MSG Converter for Mac, to safely import MSG to Hotmail. The program can convert one or more MSG files simultaneously. MSG attachments can be exported to a variety of file types, including CSV, MBOX, EML, PDF, and DOC. Migrating MSG files into different email clients, such as Office 365, GoDaddy, Gmail, Yahoo, Thunderbird, and others, is another feature of MSG Converter for Mac. You can try the tool's functionality and the first 50 emails with its free demo edition.

https://www.macprotools.com/msg-converter/