How to Convert Pegasus Mail to Outlook on Mac & Windows OS?

Ritu Roy | Email Conversion email migration How to's mailbox Software Technology | 4 minutes read | Modified on: 01-08-2025
how to convert pegasus mail to outlook

Pegasus Mail, originally developed for MS-DOS and later adapted for Mac, is now an actively supported email client on Windows. Initially released as freeware, it has transitioned into donationware over time. Despite its loyal user base, many users today are looking to convert Pegasus Mail to Microsoft Outlook, which offers enhanced features, better security, and greater integration capabilities.

Outlook primarily works with PST and MSG file formats, making it impossible to directly access Pegasus Mail’s proprietary file formats like PMM and MBX. But don’t worry, in this article, we’ll walk you through the effective methods to convert Pegasus Mail emails into Outlook-compatible formats, ensuring a smooth transition without data loss.

Reasons to Switch from Pegasus Mail to Outlook

Before moving forward, let’s highlight some of the key benefits of using Microsoft Outlook, which make it a preferred choice over Pegasus Mail:

  • Calendar Sharing: Easily share your calendar with colleagues to coordinate meeting times and check availability.
  • @mention: Simply type ‘@’ followed by a colleague’s name to add them to an email, highlight their name, and send them a notification.
  • Email Scheduling: Compose emails ahead of time and schedule when you want them to be sent.
  • Quick Parts: Save frequently used text snippets from one email and insert them into future messages to save time.
  • New Item Alerts: Get instant pop-up notifications for incoming messages so you never miss important emails.
  • Ignore Messages: Mute entire conversation threads so they bypass your inbox and go directly to the Deleted Items folder.
  • File Attachment Reminder: Outlook alerts you if you mention an attachment but forget to attach the file before sending.
  • Clean Up Conversation: One-click option to delete read messages in a thread, keeping only the unread ones for a clutter-free inbox.
  • Automatic Calendar Updates: Outlook automatically adds flight, hotel, and car rental reservations to your calendar.

Having seen these advantages of Outlook, let’s now explore an effective method to convert and migrate your emails from Pegasus Mail to Outlook.

How to Convert Pegasus Mail to Outlook (Step-by-Step Solution)

As previously mentioned, migrating from Pegasus Mail to Outlook involves a two-step process. Below is a complete walkthrough to ensure a successful and error-free conversion.

Step 1 – Export Pegasus Mail Data to a Compatible Format

There are two options to export your Pegasus Mail data:

Option A: Using the built-in UNIX Mailbox Format

  • Open Pegasus Mail and create a new folder.
  • While creating the folder, choose “Unix Mailbox Format” instead of the default “Pegasus Mail v2.x“.
  • Move your emails into this newly created folder. You can also replicate your existing folder structure by creating multiple UNIX-format folders and copying data accordingly.
  • Pegasus Mail will store these folders at the following location: C:\PMAIL\MAIL\ADMIN\
    The files will have the.MBX extension.

Option B: Using the Free Pegasus Mail Converter Tool

  • Visit the official website: Dragon IT – Mail Converter
  • Download the appropriate version of the Mail System Converter.
  • Extract the ZIP file and install the tool on your Windows PC.
  • Launch the converter (Default path: C:\Program Files (x86)\mailconv).
  • Under the Source field, set the path to the Pegasus mailbox (e.g., C:\PMAIL\MAIL\ADMIN).
  • Set the Destination to any folder (e.g., Desktop).
  • Go to the Folders menu and select “Netscape”.
    This will convert the Pegasus Mail files into a format (no extension) compatible with email clients like Eudora, Netscape, Thunderbird, etc.

Note: This method helps generate MBOX-style files that can be imported into various email clients. However, to access this data in Outlook, you’ll need to proceed to Step 2.

Step 2 – Convert Pegasus Mail to Outlook Using a Professional Solution

Once all Pegasus Mail files are saved in .mbx format or as files without extensions, users can utilize a reliable MBOX to PST Converter Tool to convert them into Outlook-compatible PST format. The converted files can be easily imported into all major versions of Microsoft Outlook, including Outlook 2019, 2016, 2013, 2010, 2007, and 2003.

This professional tool ensures complete data integrity by preserving all email attributes, such as sender, recipient, timestamps, and attachments, as well as maintaining the original folder hierarchy. Additionally, it offers both batch conversion for processing multiple files at once and selective conversion for more targeted migrations.

Steps to Convert Pegasus Mail to Outlook

Once you have your files in MBOX or MBX format, the final step is to convert them into PST, which is compatible with Microsoft Outlook:

  1. Download and launch a reliable MBOX Converter tool on your system.
  2. Add the exported Pegasus files (MBOX or MBX format) using the Add Files option.
  3. Choose PST as the output format.
  4. Set the destination folder to save the converted PST file.
  5. Click Convert to begin the conversion.
  6. Once complete, open MS Outlook and import the PST file via File > Open & Export > Import/Export > Import from another program or file > Outlook Data File (.pst).

This two-stage approach ensures your Pegasus Mail data is properly formatted and safely transferred into Microsoft Outlook.

Final Thoughts

This blog has outlined the complete process for converting Pegasus Mail to Outlook. While migrating Pegasus Mail to MBOX-supported clients like Thunderbird is relatively straightforward, thanks to their shared file compatibility, no direct method exists for importing Pegasus Mail data into Microsoft Outlook.

To bridge this gap, we’ve provided practical, step-by-step methods that help users convert Pegasus Mail files into Outlook-supported formats. Whether you’re switching to Thunderbird or Outlook, the strategies shared here will ensure a smooth, secure, and accessible migration, allowing you to retain and access all your Pegasus Mail data in your desired email client.