GNUMail stands as an open-source, cross-platform email client that finds its primary development focus on Mac OS and UNIX-like systems. Powered by GNUstep, this versatile email client offers robust support for POP and IMAP accounts. Moreover, GNUMail comes with comprehensive filtering options that apply to both incoming and outgoing messages. It supports two native file formats: Maildir, where messages are organized properly into subdirectories, and MBOX, a structured email database file. In terms of security, GNUMail prioritizes data protection and employs GnuPG email encryption for enhanced security measures.

While it's a commendable platform, GNUMail unfortunately lacks HTML format support. Additionally, the emergence of more advanced platforms like Outlook has led to a decline in its user base. Consequently, both organizations and individuals are increasingly transferring their mailbox data from GNUMail to Outlook. However, such a migration requires the assistance of a robust migrator tool.

Thus, this article will guide you through a step-by-step process of a reliable tool to perform the migration successfully.
Why choose professional tool for GNUMail to Outlook PST conversion?
Neither GNUMail nor Outlook offers a straightforward method for transferring emails between them. Therefore, relying on a professional Kernel for MBOX to PST tool to convert GNUMail's MBOX files to Outlook PST is highly advisable. It ensures an error-free conversion in a few simple steps. Apart from this, there are several other reasons for using a professional tool for GNUMail to Outlook migration, including:
  1. Users can convert multiple files simultaneously to various formats such as PST, MSG, DBX, EML, etc.
  2. It can directly migrate your MBOX files to Office 365, Gmail,, and more.
  3. This tool allows you to save MBOX files easily to the Domino server, GroupWise, and live exchange.
  4. This user-friendly tool allows its users to preview their mailbox content before migration.
  5. Supports various filters for precise data migration.
  6. It ensures complete data integrity throughout the conversion process.
Conversion of Mailbox items from GNUMail to Outlook
Follow the instructions below to convert GNUMail's MBOX files to Outlook PST successfully.
  1. Open the application, Browse to select a folder that contains MBOX file.
  2. Note: Users can choose folders or files based on their needs.
  3. Begin by selecting the Browse button to upload a folder. Click on brows button to add file
  4. After adding the folder, hit the Finish button to continue. Locate the folder in your system
  5. Choose a folder from the left panel to access its contents, and click the Save button to store the file. Preview of GNUMail
  6. Select the output format as PST file (MS Outlook), then tap on Next. Select PST file format as saving option
  7. You can filter the data using parameters, such as date range, recipient address, destination address, subject, or item type and proceed to Next. Select the filter option
  8. You can use the Split or Prefix features in this step, but they are optional. If you don't need them, feel free to skip this step by clicking on Next. Split the large size PST file
  9. Select the Browse button to specify where you'd like to save the converted file, and then hit Finish. Provide destination to the file
  10. You can see the location of your saved file on the screen, click OK to end the procedure. GNUMail to PST conversion done

Wrapping up

GNUMail was a popular email client among users due to its stability and various features. However, it has not been able to fulfil user's demands recently. Therefore, users are switching towards an advanced email client that can meet their increasing demands, such as MS Outlook. Thus, we have discussed a simple yet reliable solution, i.e., an automated Kernel for MBOX to PST tool for GNUMail to Outlook migration.