Are you interested in learning how to import emails from Outlook to Thunderbird? If so, your quest is now done and you don't need to wait any longer. The process of converting Outlook emails to Thunderbird MBOX format will be covered in this post. After reading this article, you will know [**how to import PST in Thunderbird without Outlook**](https://www.cubexsoft.com/blog/transfer-emails-from-outlook-to-thunderbird/). # Overview of Microsoft Outlook and Mozilla Thunderbird **Microsoft Outlook –** One of the most well-known and widely used email clients. The MS Office suite is the creator. It is a manager of personal information. It serves as a personal organiser and keeps track of contacts, schedules, tasks, notebooks, and other things. To save emails locally, Microsoft Outlook supports the PST (Personal Storage Table) and OST (Offline Storage Table) file formats. **Mozilla Thunderbird –** It is an open-source email application that may be used with various operating systems, including Mac and Windows. The Mozilla Foundation created it. It keeps information in MBOX files. It is a freeware local email client application. # Why Is It Necessary to Switch from Outlook to Thunderbird? Because Mozilla Thunderbird is an open-source email application, there are no fees for users. It is the main reason for switching from Outlook to Thunderbird for email. Users who want to save money can switch to Thunderbird and choose an open-source application like Mozilla Thunderbird instead of Outlook. A user may utilise various email applications for both personal and professional purposes in a variety of circumstances. Users want to know how to import PST in Thunderbird without Outlook for this reason. # How to Import Mail from PST to Thunderbird – With Outlook PST Converter Tool Users have the option of using an automated tool, such as [**Outlook Converter**](https://www.cubexsoft.com/outlook-export/) software, to get over the limitations of the manual approach. A lot of people use this application to export emails from Outlook to Thunderbird. It won't take long to complete the export process from start to finish. In addition to many others, it supports a wide range of file types, including PDF, MBOX, NSF, EML, Gmail, G Suite, Exchange Server, and so on. It worked with Windows OS, including Windows 11, MS Outlook and Mac OS. MS Outlook and Thunderbird email clients are not required to be installed in order to complete the conversion process. # Working Steps to Import PST File to Thunderbird without Outlook Directly Before you follow the software's step-by-step guidelines, download and launch this utility on a windows machine. Then, carry out the procedures listed below to import PST emails into Thunderbird: **Step 1.** Open this software, and then select the Add Files option to add PST files for conversion. **Step 2.** After importing PST files, you can view all of the selected emails in the software's preview box by selecting All and then click on Export. **Step 3.** Next, pick Thunderbird as the output format and browse to the desired location to select the path. Then click Convert to begin the PST to Thunderbird conversion procedure. **Step 4.** As soon as you click the Convert button, the conversion is being done in real time. Conversion Done Successfully will appear as a notification of success after a little period of time. Click OK to complete the process after that. # Conclusion In closing, I'd like to highlight that the [**PST to MBOX Converter**](https://www.cubexsoft.com/pst-to-mbox/) Tool is the best option for completing your task of importing PST mail into Thunderbird. Because of its user-friendly interface, this software can be used by both experts and non-professionals. Additionally, you can test its functionality by downloading the free Demo or Download edition, which enables the free conversion of 25 emails from each PST file to Thunderbird. If you have a large number of PST files and need to import them into Thunderbird, you can purchase a licenced key that will allow you to do so without any problems.