GNUMail is an open-source, cross-platform email client primarily developed for Mac OS and UNIX like systems. Based on GNUstep, this email client supports POP and IMAP accounts. In addition, GNUMail is integrated with filter options for both incoming and outgoing messages. It has two native file formats, Maildir (messages are organized as subdirectories) and MBOX (email database file). Talking about security features, GNUMail uses GnuPG email encryption to maintain data security.

Despite being such a great platform, it lacks support for HTML format. Moreover, the presence of advanced platforms like Outlook has also affected its user base. Many organizations, as well as individuals, are now moving their mailbox data from GNUMail to Outlook.

Benefits of Using Outlook Over GNUMail

GNUMail, being a great email client, still fails to fulfill the user's requirements. There are several reasons why users want to switch from GNUMail to Outlook:

  • Fully-featured, high-performance native desktop application for Windows, Mac, web, phone, etc.
  • Widely preferred email client and is part of the Microsoft 365 suite.
  • Connects seamlessly with Word, Excel, PowerPoint, Teams, and OneDrive.

Direct Way for GNUMail to Outlook PST Conversion

GNUMail saves all emails in either Maildir or MBOX format. However, neither GNUMail nor Outlook offers a straightforward method for transferring emails between them. Therefore, relying on a professional tool like Kernel for MBOX to PST to convert GNUMail's MBOX files to Outlook PST is highly advisable. Converting mailbox from GNUMail to Outlook with the tool requires only a few simple steps. Follow the below mentioned procedure carefully:

  1. Launch Kernel for MBOX to PST software and click Browse to add a GNUMail MBOX file.Click on brows button to add file
  2. Once the folder is added, click on Finish to proceed.Locate the folder in your system
  3. Select a folder from the left-hand side panel to view its contents. Then, click Save for saving the file in Outlook PST format. Preview of GNUMail
  4. Select the output format as PST file (MS Outlook) and click on the Next button. Select PST file format as saving option
  5. For specific MBOX data conversion, choose filters like date range, recipient address, a destination address, subject, and item type, if needed. Click Next.Select the filter option
  6. Use the Split option to save large resultant PST into multiple smaller ones. You can also attach a prefix to the file name to make it unique. Click Next.Split the large size PST file

    Note: Both split and prefix features in this step are optional; skip it if not required.

  7. Click Browse, provide a destination to save the converted file, and click Finish once done. Provide destination to the file
  8. The converted file gets saved to the specified location. Click OK to finish the process. GNUMail to PST conversion done

Now you can easily import the PST file into your Microsoft Outlook application to access GNUMail email effortlessly.

Last Say

We hope you now know the complete step-by-step procedure to access GNUMail email in Outlook PST. To import MBOX to Outlook manually, you can import the MBOX file into Thunderbird, export each email as EML, and import the EML file again into Outlook for accessibility, but the chances of missing important emails is high, and it is not suitable for bulk emails. Since there is no direct and safe way to convert MBOX email to Outlook PST, you can use an MBX converter tool. To get started, download the free trial version today!

Sahil Verma
Sahil VermaTechnical Writer

This article is written by Sahil Verma, a technical content writer at Kernel Data Recovery. This content has been reviewed in accordance with our editorial guidelines.

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