How to Import MBOX to ProtonMail Account: A Simple Guide

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To import MBOX files into ProtonMail, follow these steps using the ProtonMail Import-Export app or a third-party migration tool.

Method 1: Using ProtonMail Import-Export App​

• Download the Import-Export App: This app is available for Windows, Mac, and Linux users. You can find it on the official ProtonMail website
• Log In: Open the app and log in using your ProtonMail credentials.
• Select Email Address: Click on your username to view your email addresses. Choose the one where you want to import the emails and click on the Import button next to it
• Import Local Files:
  • Choose Import local files.
  • Select the folder containing your MBOX files. The app will search for MBOX and EML files recursively.
  • Specify any desired labels or date ranges for the import.
• Start Importing: Click on Import to begin the process. The emails will be encrypted using your public key upon import

Method 2: Using Third-Party Tools​

If you prefer a more direct method or need to migrate multiple MBOX files, consider using a third-party migration tool like Cigati MBOX Converter Tool:

• Install the MBOX Converter Tool on your system.
• Click on Add File(s)/Add Folder to select your MBOX files for migration.
• Choose IMAP as your saving option, then enter your ProtonMail credentials along with the IMAP host and port number.
• Click on Export to initiate the transfer of MBOX files to your ProtonMail account.
• Monitor the live export status within the application.

Conclusion​

Both methods are effective for importing MBOX files into ProtonMail, with the Import-Export app being suitable for individual users and small imports, while third-party tools may be more efficient for larger migrations.