Which MIME types are related to file extension ".eml"?

The .eml file extension is associated with 2 MIME types:

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

About .eml Files

EML files are email message files that store a single email in plain text format.
They follow the RFC822 standard and use the MIME type message/rfc822 to signal their format.
Occasionally, they relate to application/mbox when emails are stored within larger collections.

Main Use: Saving, archiving, and sharing individual email messages.
Additional Uses: Backing up emails and transferring messages between email clients.
Software Support: Open them with email apps like Microsoft Outlook, Mozilla Thunderbird, or Apple Mail. Simple text editors can view them, but dedicated clients render the content better.

Based on information from FilExt.com, an EML file contains email details such as sender, recipient, date, subject, and the message body, with attachments embedded if present.
This format makes it easy to view and manage emails outside of a live server environment.

Relationship between file extension and MIME type

A file extension is a suffix at the end of a filename that indicates what type of file it is. File extensions help both users and operating systems identify what application should be used to open the file.

File extensions are typically separated from the filename by a period (dot) and consist of 2-4 characters, though they can be longer. For example, in the filename "document.pdf", ".pdf" is the file extension.

File extensions are closely related to MIME types, as they both serve to identify the format of a file. However, while MIME types are used primarily by web browsers and servers, file extensions are used by operating systems and applications.

Associated MIME types

message/rfc822, application/mbox

FAQs

How do I open an EML file?

You can open .eml files using most desktop email clients, such as Microsoft Outlook, Mozilla Thunderbird, or Apple Mail. Simply double-clicking the file usually launches the default email application installed on your computer. If no email client is available, you can also view the raw content using a web browser or a text editor.

Can I view an EML file without an email program?

Yes, because EML files are stored in plain text, you can open them with basic text editors like Notepad (Windows) or TextEdit (macOS) to view the header and body text. Alternatively, you can change the file extension from .eml to .mht and open it in a web browser like Microsoft Edge or Internet Explorer to see the formatted email.

How do I convert an EML file to PDF?

The easiest way is to open the file in an email client like Outlook or Thunderbird and use the Print function. In the print dialog, select "Microsoft Print to PDF" or "Save as PDF" as your printer. There are also online converters, but be cautious when uploading files containing sensitive personal information.

What is the correct MIME type for EML files?

The standard MIME type for EML files is message/rfc822. This tells the operating system and mail servers that the file contains an email message formatted according to the RFC 822 standard. Occasionally, they may be associated with application/mbox if extracted from a larger mailbox archive.

Are EML files safe to open?

While the EML file structure itself is just text, the email body can contain malicious HTML scripts or infected attachments. Always scan the file with antivirus software before opening it, especially if the email source is unknown or suspicious.

What is the difference between EML and MSG files?

EML is an open standard format (RFC 822) supported by many different email clients and is text-based. MSG is a proprietary binary format used specifically by Microsoft Outlook. While Outlook can open both, other clients like Thunderbird handle EML natively but may require plugins or conversion to open MSG files.

How can I import EML files into my email account?

If you use a desktop client like Outlook or Thunderbird, you can typically drag and drop the EML files directly into a specific folder within the application window. For web-based email (like Gmail), you usually need to configure the account via IMAP in a desktop client first, drag the files in, and let them sync to the server.

General FAQ

What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.

MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.

MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.

How do I find the MIME type for a file?

You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.

Why can one extension have multiple MIME types?

Different programs and historical usage may assign various MIME identifiers to the same file format. Listing them together helps maintain compatibility across tools.