However, before proceeding to the import process, first of all users need to install "Import Export Tools" add-on. And make sure the MBOX backup system is set up to prevent data loss if the import process is disrupted.
Step 1: Start Thunderbird by navigating to Programs and then Mozilla Thunderbird
Step 2: Now click on Tools option, and then select 'Import Export Tools' option ⇒ click 'Import MBOX file' option.
Step 3: In the pop-up, choose the 'Import directly one or more MBOX file' option and after that click 'Ok'.
Step 4: Browse for the MBOX file in the specific location where they are stored and click 'Open' button to start the import process.
Step 5: After the import process you will see all your mailboxes items as shown below:
If you have imported your e-mail file into MBOX file format and you want to import it into Thunderbird with the help of manual methods, it will be easy to access these files in this email client. The import process of the MBOX file for Thunderbird can be convenient and hassle-free, but it does not guarantee that the data in the mailbox will remain intact and there will be no loss. Therefore, this task should be done automatically using professional software.
MBOX to PST Converter Software