If you want to Import Outlook OST files to Yahoo Mail, I recommend you to get eSoftTools OST to PST converter software. This tool has a demo version that can allow users to convert 25 items from each folder. It has multiple file formats for conversion
such as OST to PST, EML, EMLX, Office 365, Yahoo Mail, Gmail, and vCard. Etc. It has technical support users can get help by email or live chat. It has email filtration, users can convert emails by using specific dates. It converts corrupted OST files
into PST files.
Read More:
https://www.esofttools.com/ost-to-pst-converter.html
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