​When moving from Microsoft Outlook to other email clients such as Thunderbird, Apple Mail, Eudora, etc., converting PST (Personal Storage Table) files to MBOX (Mailbox) format helps. Different email applications on different systems generally accept the open standard MBOX file format. The following article describes several approaches for converting PST files to MBOX format.

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Method 1: PST file Conversion to MBOX Without Outlook and Thunderbird 

Quickly export PST emails to MBOX file format with TrustVare PST to MBOX Converter Tool on your Windows PC. It lets you move PST files produced by MS Outlook 2021, 2019, 2016, 2013, 2010, and past editions. On Windows OS Versions like 11, 10, 8.1, 8, 7, XP, Vista as well. This makes it simpler to rapidly convert several emails taken from the PST file all at once. It preserves original database files in Thunderbird mailboxes from Outlook PST. It lets open on Mozilla Thunderbird, Apple Mail, Eudora, Entourage, Opera Mail, etc. Email clients of MBOX. It also lets you straight import PST from Outlook to Thunderbird. Simple UI makes the interface easy to operate. One can use it with or without expertise in technology. It also helps convert PST files locked with passwords without using the password. Customer help 24/7 is offered here. Download a lightweight tool and try using the free demo edition. 

These Instructions Guide PST Export to MBOX File:

• Install the TrustVare PST to MBOX Converter Software on your machine.
• After using the browser option, choose the PST files.

• Before the conversion, you can examine the preview of the PST files.
• Select the location and destination path; then, under browse, click.

• Click the convert button at last to finish the conversion.

Method 2: Manual CSV file PST Conversion to MBOX

First: Export PST file data to CSV, then personally translate PST file data to MBOX format. The behaviors follow:

• Create CSV form first from exporting PST file data.
• Open Outlook; chose File > Open & Export > Import/Export.
• First choose Export to File, then Next.
• Click Next following commas separated values.
• Click Next from the folders or mailboxes you wish to convert.
• Choose a place to save and name the file. Keep in mind that you will require this area and a name in the upcoming few phases.
• Starting the exporting procedure with Click Finish

Second: Turn the CSV File into MBOX

• Launch a Microsoft Excel or Google Sheets spreadsheet application.
• Launch a spreadsheet application open the CSV file.
• Eliminate columns extraneous for the conversion procedure.
• Save the altered CSV file under "plain text," with the ".mbox" file extension.
• Close your software for spreadsheets.

Third: Import your Email Client to the MBOX File.

• Importing the MBOX file into the email program of your preference comes last. MBOX file imported into Thunderbird:
• Open Thunderbird and click on the local folders from the right side.
• Select Import Export Tool NG above the MBOX file.
• Click Choose File and choose the MBOX file produced in the second step.
• Strike the Finish to initiate the import procedure.
• All the PST file data will be accessible in Thunderbird in MBOX form once the import procedure finishes.

Method 3: Thunderbird MBOX Conversion from PST File

Popular open-source email software, Thunderbird, supports MBOX file format. The following explains how Thunderbird might convert PST into MBOX.

• Launch Thunderbird, then open a fresh folder to import the PST file.
• Install the "ImportExportTool NG" add-on found on the Thunderbird add-ons website.
• Click the folder you wish to import PST files from and then navigate to Tools > ImportExportTools NG > Import all messages from the directory.
• Choose the "Microsoft Outlook" option in step 4 then choose the PST file to import.
• Choose the Import by file option and the target folder in which you wish to import the messages in step five.
• Once the import process finishes, you should select every message in the folder and use the "Store As" option to save them in MBOX format.

Final Notes

Although it's simple, manually converting PST to MBOX can take time especially if you have a lot of emails to translate. Furthermore, hand approaches might not retain all the formatting of the original PST file as well as the data. Consequently, we advise ensuring a flawless and effective conversion process by using a professional tool such as PST Converter. Easy to use, the recommended utility lets you convert PST files to MBOX without Outlook or Thunderbird programs.