To
convert Thunderbird MBOX to PST for Outlook, the safest option is to use a method that directly handles Thunderbird’s MBOX files without changing their structure. Thunderbird stores emails locally in MBOX format, but Outlook does not support this format, so manual exports can be time-consuming and unreliable.
A simple way to convert Thunderbird MBOX to PST is by using a dedicated tool like
MacSonik MBOX Converter Tool. You just add the Thunderbird MBOX files to the software, choose PST as the output format, and start the conversion. The tool keeps emails, attachments, and folder hierarchy intact, ensuring the resulting PST file opens correctly in Outlook.