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Best Answer: With the all-new Yahoo Mail, there is no option to import pst files. However, in the Yahoo Mail Classic the only thing you can import are contacts in the address books. Here are the steps to do import/export of contacts: 1. Choose a program to import contacts from: Yahoo! (.CSV file)
Select the 'File' menu and click 'Import and Export'. Click 'Import from another program or file' and click 'Next'. Select 'Personal Folder File (.pst), and then click 'Next'. In the File to Import box, specify the path and file name of the saved .pst file to import.lick on the 'File' tab, select 'Open' and 'Import' to launch the Import/Export Wizard. Select 'Import Internet Mail and Addresses' and click next. Select the Outlook Express or Windows Mail option. Check the 'Import Mail' box and click 'Finish'.