I would like to suggest you can also try Yahoo Backup Software to backup Yahoo Mails. It Supports to all Outlook Versions i.e. Outlook 2019, 2016, 2013, 2010, 2007, 2003, etc. You can also test the FREE Demo edition which is available for users. This utility allows for the safe and quick migration of all Yahoo mailbox items in bulk while maintaining high data integrity. It helps to convert Yahoo emails into EML, EMLX, MBOX, PST, and MSG file formats.Users have full control over the conversion result because the tool connects with a specific Yahoo account for which it needs correct username and password.
Read more :- https://www.osttopstapp.com/yahoo-backup.html