Are you looking for the solution to open received PST file in Thunderbird Application? Then, don't worry, this Q&A will solve this query. To Open received PST file in thunderbird application, you first need to download that PST file to your computer PC, and then you need a third-party solution, because you can not directly open PST file in any MBOX supporting application. The Email clients that work on the MBOX format can't open PST files easily, which is why users need PST to MBOX converter. You can try BitRecover PST to MBOX Converter to directly open received PST files in Thunderbird application or other MBOX supportive email clients.