SysInfo Yahoo Backup Tool helps users securely back up Yahoo Mail emails, attachments, contacts, calendars, and other mailbox data. It exports Yahoo emails to PST, PDF, MBOX, EML, MSG, CSV, HTML, DOC, and additional file formats while maintaining folder hierarchy, metadata, and email integrity. The software supports selective backup using date-range filters, incremental backup to avoid duplicates, bulk mailbox processing, and fast performance. Compatible with both Windows and Mac, it provides a reliable solution for email backup, migration, archiving, and data protection.