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 Berkely 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. However, to achieve such migration, a powerful migrator tool is needed. The most recommended email converter is Kernel for MBOX to PST.

Here are a few instructions that you need to follow while convert MBOX files of GNUMail to PST:

  1. Launch the MBOX converter software.
  2. Start with clicking on the Browse button to add a folder. Click on brows button to add file
  3. Once the folder is added, Click Finish to proceed Locate the folder in your system
  4. After the scanning process is over, the mailbox folders are displayed on the left side of the tool’s interface. Select a folder from the left-hand side panel to view its contents. Then, click the Save button to save the file in PST format. Preview of GNUMail
  5. Select the output format PST file (MS Outlook) and click on the Next button. Select PST file format as saving option
  6. To specify the conversion content for the file, select from the list of filter available. For instance, you can sort the data based on date range, recipient address, a destination address, subject, and item type. Click Next to move further in the process. Select the filter option
  7. To manage the converted PST, you can use the Split option. The Split drop-down box allows you to split the file in predefined proportions. You can also attach a prefix to the file name to make it unique. Once done, click on the Next button. Split the large size PST fileNote: Both split and prefix features in this step are optional; skip it if not required.
  8. Click the Browse button to provide a destination to save the converted file and click Finish once done Provide destination to the file
  9. The converted file gets saved to the specified location. Click OK to finish the process. GNUMail to PST conversion done