EML

An EML module for Node.

const _ = eml(
  recipient('Tomas Hubelbauer', 'tomas@hubelbauer.net'),
  name('Tomas Hubelbauer', 'tomas@hubelbauer.net'),
  subject('Test Email'),
  'Hi there!',
  '<p>Check out this picture:</p>',
  `<img src="${inline('hi.png', await fs.readFile('hi.png'))}" />`,
  `<p>It's CID is ${inline('hi.png')}.</p>`,
  `<p>Check it out again: <img src="${inline('hi.png')}" />.</p>`,
  '<p>See your crap attached.</p>',
  attachment('crap.csv', await fs.readFile('crap.csv')),
  'Thanks!'
);

Features

• Has helpers for various common headers
• Generates plain text version from an HTML email
• Has helpers for inline and attached files
• Slices related contents representation to 76 MIME characters automatically
• Slices long HTML lines to 76 MIME characters automatically and correctly

Installation

npm install https://github.com/TomasHubelbauer/eml

Usage

eml(
  'string',
  7, // number
  helper(),
  …
)

subject Helper

subject('subject')

sender Helper

sender('name', 'email') or sender('email')

recipient Helper

recipient('name', 'email') or recipient('email')

inline Helper

inline('name', 'type', buffer)

Use in HTML through <img src="cid:name@" />.

Status

The stuff documented in this readme is working and there are some tests, too.

Changelog

1.0.0 2020-03-03

Initial release with the subject, sender, recipient and inline helpers.

Testing

node test (with or without extension) npx nodemon test.js (with extension) to run the tests on each change.

To-Do

Split long HTML lines contextually in order not to break semantics

Do not split tag name, attribute names and attributes values. Do not split words.

Split long plain text lines

Split long header values

Subject, sender(s), recipient(s) etc.

Allow multiple senders and recipients

Probably by concatenating multiple instances of the helper.

Add more range and format checks throughout

Add a helper for attachments

Include the plain text variant even with HTML-only emails with no multiparts

Add encoding to the plain and HTML variants to support Unicode