MessageText-based

`message/rfc822`

Email Message (RFC 822)

Reference for message/rfc822, the MIME type for complete email messages with headers, body, and attachments.

MIME Type Detector

Drop a file to detect its MIME type — no upload, runs in your browser

📄

Drop any file here or click to choose

Expected extensions: .eml, .msg

HTTP Content-Type Header

HTTP Header

Content-Type: message/rfc822; charset=utf-8

Associated File Extensions

.eml.msg

Quick Facts

MIME Type	message/rfc822
Category	Message
Type	Text-based (human-readable)
Extensions	.eml, .msg

Common Usage

message/rfc822 encapsulates a complete email message, including all headers (From, To, Subject, Date), body content, and MIME attachments. Used for forwarding emails as attachments, email archiving, mailing list digests, and email migration between systems.

Code Examples

HTML

<!-- Link or embed with explicit type -->
<link rel="stylesheet" href="file.eml" type="message/rfc822">

<!-- Or for script/media elements -->
<script type="message/rfc822" src="file.eml"></script>

Node.js

// Express.js
app.get('/file', (req, res) => {
  res.type('message/rfc822');
  res.send(data);
});

// Node.js http
res.writeHead(200, { 'Content-Type': 'message/rfc822' });

nginx

# nginx.conf — add to types block or use default
types {
    message/rfc822  eml msg;
}

# Or set for a specific location
location /api/ {
    default_type message/rfc822;
}