EML vs MSG vs MBOX: Key Differences Every Developer Should Know
Last Updated: 24 Mar, 2026
Email remains one of the most widely used digital communication systems in the world. Behind every email message lies a structured file format that stores the message content, attachments, metadata, and headers. For developers building email clients, migration tools, archiving systems, or automation workflows, choosing the right email file format is critical.
Among the most commonly used email formats are EML, MSG, and MBOX. Each format has its own structure, compatibility level, and development advantages.
PST vs. MSG: What's the Difference and When to Use Each File Format?
Last Updated: 10 Nov, 2025
If you’ve ever needed to save or back up your Microsoft Outlook data, you’ve likely encountered two key file formats: PST and MSG. While they might seem similar at first glance—both are created by Outlook and store email data—they serve fundamentally different purposes.
Choosing the wrong one can lead to cluttered digital storage, inefficient backups, or difficulty finding important information later. So, what’s the real difference between a PST and an MSG file?