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The structure and rendering of multipart emails

The structure and rendering of multipart emails

How do multipart emails work?

Published on by Anton Vasetenkov
Topics: Email

When marked as multipart/alternative, an email message can contain multiple versions of the same content which allows the email client to render the message in the most appropriate format for the user's device. In most cases, two versions are included: the plaintext version (text/plain) and HTML version (text/html). Other content types such as AMP (text/x-amp-html) are often used in conjunction with the plaintext and HTML versions.

See also

cid URLs for email developers
What are cid URLs and how are they interpreted by email clients?
MAIL FROM and RCPT TO vs. the To and From headers
The difference between the email envelope and message headers when it comes to senders and recipients.
Receiving email with Node.js
How to receive email in Node.js?

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