Compare
MSG vs EML
MSG stores Outlook items and can represent more than email, including appointments and contacts. EML is commonly used to save or transfer one internet email message at a time.
Which format should you choose?
Choose MSG for individual Outlook items in an Outlook-centered workflow. Consider EML when handing a single email to compatible mail apps, and verify the recipient can open it.
Good fit for MSG
Save or share individual Outlook items
- Emails, appointments, contacts, or tasks in Outlook workflows
Good fit for EML
Save or share one email message
- Keeping message headers, body, and attachments together
Basic information
| Field | MSG | EML |
|---|---|---|
| Extension | .msg | .eml |
| MIME type | application/vnd.ms-outlook | message/rfc822 |
| Common uses | Save or share individual Outlook items | Save or share one email message |
| How to open | Use Outlook or a compatible viewer. Verify the file's origin before opening attachments. | Use a trusted mail client or viewer. Check the sender and attachment origin before opening attachments. |
| Export or convert | When converting to EML or another format, check message body, attachments, dates, and any appointment or contact fields. | When saving as PDF or another format, check that needed headers, body, dates, and attachments remain accessible. |
Choose by use case
Emails, appointments, contacts, or tasks in Outlook workflows
Save or share individual Outlook items
MSGKeeping message headers, body, and attachments together
Save or share one email message
EMLKey point 1
MSG can preserve Outlook-specific item data such as messages, appointments, and contacts.
More on the differencesKey point 2
EML is centered on one email with its internet-message headers and body.
More on the differencesMore on the differences
Check that the target app supports the file and that headers, dates, body text, and attachments remain intact after export or conversion.
- MSG is an Outlook item format; EML is generally used for individual email messages.
- Both files may contain attachments or personal information, so inspect the contents and recipient before sharing.
Frequently asked questions
Which is more portable, MSG or EML?
EML is often easier to exchange with compatible mail clients, while MSG may retain Outlook-specific item details. Actual support depends on the receiving app.
Can every email app open MSG?
No. Confirm support in the recipient's application and test a real sample.