MessageText-based

`message/imdn+xml`

IMDN (Instant Message)

Reference for message/imdn+xml, the MIME type for Instant Message Disposition Notification in messaging protocols.

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HTTP Content-Type Header

HTTP Header

Content-Type: message/imdn+xml; charset=utf-8

Quick Facts

MIME Type	message/imdn+xml
Category	Message
Type	Text-based (human-readable)

Common Usage

IMDN (Instant Message Disposition Notification) provides delivery and display receipts for instant messaging. It is used in RCS (Rich Communication Services), SIP-based messaging, and carrier messaging platforms to confirm that messages have been delivered and read.

Code Examples

HTML

<!-- Set MIME type in meta or fetch headers -->
<meta http-equiv="Content-Type" content="message/imdn+xml">

Node.js

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

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

nginx

# nginx.conf — add to types block or use default
types {
    message/imdn+xml  xml;
}

# Or set for a specific location
location /api/ {
    default_type message/imdn+xml;
}