If you're having trouble opening a DAT file, I'll show you a simple and free way to do it. This method works on both Mac and PC. Just open your browser and go to winmaildat.com. It's a straightforward ...

This command opens the specified file in its default application. For example, a markdown file might open in Xcode or another text editor. Open a File in a Text Editor: open -t ./path/to/your-file.md ...