PMI File Extension
Pegasus Mail Message Folder Index
- File Type pmi
- Developer David Harris
- Popularity
- Application Pegasus Mail
- Category Email Program Files
What is a PMI file?
The PMI extension is related to Pegasus Mail Message Folder Index and is classified in the Email Program Files category, which contains 50 files.
The Pegasus Mail Message Folder Index (PMI) was developed by David Harris, which created file format and programs to work with them.
PMI files are supported by Windows. To open a PMI file, you can choose from 2 programs such as Pegasus Mail and Aid4Mail.
How to open a PMI file?
If you cannot open a PMI file, it is most often due to missing software. Select a program from the list according to your operating system. Then go to the official website of the program developer, download it, and install it on your device.
Pegasus Mail and Aid4Mail stand out as the preferred programs to manage PMI files effectively. To install the current version of Pegasus Mail, go directly to the official David Harris website. The universal package for all operating systems is available there.
After successful installation, your operating system should seamlessly handle PMI files via Pegasus Mail.
Set Pegasus Mail as the default PMI program
Change Default Program on Mac
- Right click or Control + left click on the desired PMI file;
- Choose "Open in Application" and click "Other";
- Go to the lower section of the window, where you will find the "Enable" menu. By default, it is set to "Recommended Programs";
- Select "All Programs" from this menu and proceed to search for Pegasus Mail. Check the box next to "Always open in app" to set it as the default option.
Set default programs for Windows
- Start by right-clicking on your PMI file, then select the "Open with" option and choose "Choose another app" from the menu that appears;
- In the pop-up window, select the Pegasus Mail application;
- Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening PMI files.
Solve problems with PMI files
PMI files may present some challenges, but most can be easily addressed with minor software tweaks. See the troubleshooting tips below for guidance.
What are the ways to check if my PMI file is damaged?
PMI email program files that have become corrupted may display one or more of the following symptoms:
- The file does not respond or shows errors when opening it;
- The file exhibits poor performance during editing operations in Pegasus Mail;
- The file stops responding or freezes in Pegasus Mail or other programs;
- Unexplained PMI file size inflation;
- Actions performed on the file result in the appearance of error notifications;
Why does Pegasus Mail crash or shut down frequently?
Insufficient updates for David Harris products can cause Pegasus Mail to crash. Be sure to regularly install the latest software updates.
Restarting your computer will solve many common problems, which is why it’s the first thing you should do before changing any settings related to the software.
Is there any specific software or utility that can help repair a damaged PMI file?
Use a recovery program to open the damaged PMI file, and in the menu, click "Repair" to start the repair operation. Wait for the recovery process to finish, allowing automatic repair of damaged email program files.
How to edit a PMI file?
To make changes to PMI files, you need specialized software that allows both opening and editing the email program files. Online PMI editors offer fewer capabilities than applications optimized for Pegasus Mail Message Folder Index.
Best PMI Editor Software in 2026
With the mentioned criteria in mind, we have assembled a selection of PMI editors.
| PMI Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| Pegasus Mail | David Harris | Windows | 4.8 out of 5 (42 reviews) |