| File Extension: | MAI |
| File Type Description: | Microsoft Mail File |
| File Type Developer: | Microsoft Corporation |
| Primary Associated Software: | Microsoft Mail |
| Primary Software Developer: | Microsoft Corporation |
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Pegasus Mail is the primary software program that utilizes the Microsoft Mail File file, originally developed by David Harris. User statistics infer that these MAI files are popular with users from China and most frequently found on the Windows 10 platform. Google Chrome is their primary internet browser for the bulk of these users.
 | Pegasus Mail by David Harris |
 | Microsoft Mail by Microsoft Corporation |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | OS/2 |
 | DOS |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .CDAT | Microsoft Corporation | Uncommon Files | Internet Security And Acceleration (ISA) Server Cache File |
| .NGR | NEPLAN AG | Data Files | NEPLAN Graphic Data |
| .MSH2 | Microsoft Corporation | Developer Files | Microsoft Shell Script File |
| .SP1 | Microsoft Corporation | Data Files | Microsoft Windows XP With Service Pack 1 Installation Data |
| .PST | Microsoft Corporation | Data Files | Outlook Personal Information Store File |
| .ESH | Microsoft Corporation | Executable Files | Extended Shell Batch File |
| .VSS | The Omni Group | Raster Image Files | Visio Stencil File |
| .PCS | Pfaff | CAD Files | Pfaff Embroidery File |
| .FPX | Kodak | Raster Image Files | FlashPix Bitmap Image File |
| ._WDXSLN120 | Microsoft Corporation | Data Files | Microsoft Visual Studio File |
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