What is MIME type "message/rfc822"?

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

• Main use: Storing and exchanging complete email messages.
• Key fact: It preserves sender, recipient, subject, date, and message body details.
• Use cases: Archiving emails, transferring messages between systems, and rendering messages correctly in email clients.
• Practical benefit: Ensures email content is processed as intended by software.

Associated file extensions

.eml, .mht, .mhtml, .mime

Usage Examples

HTTP Header

When serving content with this MIME type, set the Content-Type header:

    Content-Type: message/rfc822
  

HTML

In HTML, you can specify the MIME type in various elements:

    <a href="file.dat" type="message/rfc822">Download file</a>
  

Server-side (Node.js)

Setting the Content-Type header in Node.js:

    const http = require('http');
    
    http.createServer((req, res) => {
      res.setHeader('Content-Type', 'message/rfc822');
      res.end('Content here');
    }).listen(3000);
  

Associated file extensions

.eml, .mht, .mhtml, .mime