If you are searching for the best and most reliable tool to back up Yahoo emails, look no further than the MacSonik Yahoo Backup Tool. This software can back up Yahoo mailboxes into multiple file formats like PDF, PST, MBOX, CSV, etc on macOS. It gives you a mail filter option that allows users to back up or migrate selected emails. Using this tool, users can import their Yahoo Mail emails to multiple email clients such as Office 365, GoDaddy, iCloud, IMAP, Hotmail, Zoho Mail, etc.