If you want to convert Mozilla Thunderbird emails to Outlook PST format for free, eSoftTools Thunderbird Email Viewer Software can be a helpful option. This software allows you to easily open, read, and preview Thunderbird MBOX mail files without needing to install Thunderbird. The free version lets users view a detailed preview of their emails, allowing them to verify the data before conversion. With its simple interface and secure processing, this tool is useful for users who want to check their Thunderbird data before migrating it to Outlook.

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