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Expert Solution to Convert Pegasus Mail to Thunderbird

  Mark Regan
Mark Regan
Published: February 11th, 2026 • 4 Min Read
Summary: Converting Pegasus Mail to Mozilla Thunderbird can be difficult task, because Mozilla Thunderbird doesn’t directly support Pegasus Mail-created files. To convert Pegasus Mail to Thunderbird, users will need to use either a professional solution or a free method. In this guide, users will learn the expert-recommended method to convert Pegasus Mail to Mozilla Thunderbird.

DIY Methods to Convert Pegasus Mail to Thunderbird

In this method, users need to follow multiple steps to export Pegasus Mail to Thunderbird. This process will not be easy for users and keep follow each step. If users miss any single steps they can lose Pegasus Mail data forever.

Method 1: Import Pegasus Mail to Thunderbird by IMAP Sync

  1. Open Pegasus Mail >> Go to Tools >> Choose Internet Option.
  2. Configure email account as IMAP, not POP.
  3. Click on “Save Settings.”
  4. Close & Restart Pegasus Mail.
  5. Drag n Drop emails or folders into IMAP folders.
  6. Wait for syncing and verify emails that show in Pegasus.
  7. Login same email account in Thunderbird.
  8. Wait a few moments, and Thunderbird will sync all emails automatically.
Note: This method needs technical experience & IMAP Settings knowledge to upload Pegasus Mail data into Thunderbird. Users should also remember that server storage should be sufficient to sync all email data.

Method 2: Convert Pegasus Mail to Thunderbird without IMAP

If users don’t know about the IMAP settings, they can use this method. This solution is also fully free and works by exporting emails from Pegasus Mail into EML format and then importing files into Thunderbird.

  1. Open Pegasus Mail on your system.
  2. Choose mailbox you want to convert.
  3. Select emails by using CTRL & SHIFT.
  4. Drag and drop selected emails to folder on your desktop.
  5. Install & Open Thunderbird.
  6. Click on “Menu” and choose Add-ons and Themes option.
  7. Search “ImportExportTools NG.”
  8. Install add-on and Restart Thunderbird.
  9. Right-click on Local Folders and choose: — ImportExportTools NG → Import all messages from a directory → Also from its subdirectories.
  10. Pick folder to save EML files and click “Ok”.

Once this process is complete, Pegasus Mail emails now start showing in Thunderbird with attachments.

Note: Without IMAP syncing method is too time-consuming and risk of data loss if users don’t know about the Thunderbird settings.

Expert Solution to Convert Pegasus Mail to Thunderbird

Install & use BitRecover Pegasus Mail converter tool to export any size of Pegasus Mail files into Thunderbird. There are no data size limitations or format issues to convert Pegasus Mail PNM, CNM to Mozilla Thunderbird. Within few mouse clicks, users can export Pegasus Mail mailboxes into Thunderbird. Download free version of this solution to learn more about the software.

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Steps to Export Pegasus Mail to Thunderbird

  1. Download or Install Pegasus Mail to Thunderbird Converter.
    select pegasus file
  2. Auto-load or manually select Pegasus emails or folders.
  3. Choose MBOX as saving option.
    saving option
  4. Pick location and start conversion.
    start conversion

How to Load MBOX in Mozilla Thunderbird?

To import MBOX to Thunderbird account, users need to follow some steps: —

  1. Again Start Thunderbird.
  2. Use “ImportExportTools NG” add-on.
  3. Choose “Import MBOX Files” and click on “Individual MBOX Files” button.
    import mbox file option
  4. Browse converted Pegasus MBOX file from your computer & tap “Open” button.
    open pegasus mbox file
  5. Check imported MBOX file under “Local Folder” in Thunderbird.
    view mbox files

Premium Features of Pro Solution

  • Quick conversion without depending on email clients.
  • Time-saving procedure, unlike the manual method.
  • Convert bulk of Pegasus Mails to Thunderbird.
  • Easy-to-operate solution for technical and novice users.
  • Advanced filter features for selective Pegasus file to Thunderbird conversion.

Time to Wrap Up,

In this blog, users will learn the 2 simple procedures to convert Pegasus Mail to Thunderbird. The first method is fully free but also time-consuming. Users need to install & setup Thunderbird, IMAP account, and more. Professional solution, direct export from Pegasus Mail to Mozilla Thunderbird. No technical hassle and easy conversion procedure. Choose simple solution to convert Pegasus Mail mailboxes into Thunderbird.


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