Option 1: Using MBOX to PST converter with Outlook Desktop Client
Option 2: Changing the file extension from .mbox to .eml before using Outlook Desktop Client
Option 3: Using Mozilla Thunderbird Desktop Client with ImportExportTools Add-on
Step 1: Click “File”→ “Info” and then click the “Account Settings” icon and choose “Account Settings…”
Step 2: Click “New…” in the dialog box.
Step 3: Type in your Mail ID and click “Connect.”
How to set up your email on Thunderbird desktop client
Step 1: Open Thunderbird Desktop Client and select “Email” under ‘Choose What to Set Up:’
Step 2: In the dialog box that appears, enter your name, email address, and password and click on continue.
Step 3: Select the IMAP radio button, and click on the “Done” button.
How to install ImportExportTools add-on
Step 1: On Thunderbird, click on the hamburger icon on the right-hand corner and click “Add-ons and Themes” from the drop-down menu.
Step 2: In the next pop-up window, click on “Find more add-ons” at the bottom of the page.
Step 3: Type in “ImportExportTools NG” in the search tab on the next screen.
Step 4: Click “Add to Thunderbird.”
Step 5: Click “Install Now.”
Step 6: Restart the application to complete the installation.
Step 1: Click the Settings icon that appears on the top right-hand corner of the Gmail mailbox.
Step 2: Click “Settings.”
Step 3: Move to the “Forwarding and POP/IMAP” tab. Click “Enable IMAP.” Ignore this step if it has already been enabled.
Step 4: Click “Save Changes” to complete the action.
Step 1: Click “File” on the top left-hand corner of the Outlook window.
Step 2: Click “Open & Export.”
Step 3: Click “Import/Export.”
Step 4: In the dialog box, choose “Import from another program or file” and then click “Next.”
Step 5: In the next dialog box, choose “Outlook Data File (.pst)” and click “Next.”
Step 6: After you browse and choose the file you want to import, click “Replace duplicates with items imported” and then click “Next.”
Step 7: Choose the folder to import the file into, then click “Import items into the same folder in:”
How to extract files from a ZIP folder
Step 1: Click the “Extract All” icon on the toolbar at the top of the window.
Step 2: Select the file and right-click on it. On the menu bar that appears, click “Rename.”
Step 3: Click “Yes” at the bottom of the dialog box
How to import an EML file into Outlook desktop client
Step 1: Drag the EML file and drop it under the label of your choice.
Step 2: Double click on the message to open it.
Step 3: Click “Yes.”
Step 4: Click “Open.”
Note: This option is more suitable for when you have a single message stored in the MBOX file. If there are multiple messages in the file, all of them will be displayed under a single message after being imported into Outlook.
How to import your Gmail MBOX exports into a Gmail account
Step 1: Link your Gmail account to Thunderbird Desktop Client and install ImportExportTools add-on using these steps.
Step 2: Right-click on the left-hand pane and select “ImportExportTools.”
Step 3: In the dialog box, choose “Import directly one or more MBOX files” and browse through your PC to choose the MBOX file.
Step 4: After choosing the file, click “Open.” The MBOX file will be imported into Thunderbird with a label that’s the same as the file name.
Step 5: Drag and drop the imported data into the label’s section under your Gmail Account.
Note: If you are unable to find the restored data on Thunderbird, try restarting the application.
However, if you are looking to import MBOX to Gmail in bulk, you may have to rely on paid tools or open-source tools available on GitHub./a>