node-red-node-email-variable 1.0.6

Node-RED nodes to send and receive simple emails.

npm install node-red-node-email-variable

Node-RED nodes to send and receive simple emails.


You will need valid email credentials for your email server. For GMail this may mean getting an application password if you have two-factor authentication enabled.

Note : Version 1.x of this node requires Node.js v8 or newer.


You can install by using the Menu - Manage Palette option, or running the following command in your Node-RED user directory - typically ~/.node-red

    cd ~/.node-red
    npm i node-red-node-email-variable

GMail users

If you are accessing GMail you may need to either enable an application password, or enable less secure access via your Google account settings.


Nodes to send and receive simple emails.

Input node

Fetches emails from an IMAP or POP3 server and forwards them onwards as messages if not already seen.

The subject is loaded into msg.topic and msg.payload is the plain text body. If there is text/html then that is returned in msg.html. msg.from and are also set if you need them.

Additionally msg.header contains the complete header object including to, cc and other potentially useful properties.

Variables credentials

You can also set, msg.userid, msg.password in the payload, which will override server, login and password default values. For example, if the data is stored in a database or elsewhere. Optionally, you can set msg.port in the payload, which will override port default value. {.is-info}

Output node

Sends the msg.payload as an email, with a subject of msg.topic.

The default message recipient can be configured in the node, if it is left blank it should be set using the property of the incoming message.

The email from can be set using msg.from but not all mail services allow this unless msg.from is also a valid userid or email address associated with the password. Note: if userid or msg.from does not contain a valid email address (, you may see (No Sender) in the email.

The payload can be html format. You can also specify msg.plaintext if the main payload is html.

If the payload is a binary buffer then it will be converted to an attachment.

The filename should be set using msg.filename. Optionally msg.description can be added for the body text.

Alternatively you may provide msg.attachments which should contain an array of one or more attachments in nodemailer format.

Uses the nodemailer npm module.

More advanced fields

Routing options

  • sender - An email address that will appear on the Sender: field (always prefer from if you’re not sure which one to use)
  • replyTo - An email address that will appear on the Reply-To: field
  • inReplyTo - The Message-ID this message is replying to
  • references - Message-ID list (space separated string)

Content options

  • watchHtml - Apple Watch specific HTML version of the message. Latest watches have no problems rendering text/html content so watchHtml is most probably never seen by the recipient
  • amp - AMP4EMAIL specific HTML version of the message, same usage as with text and html. See AMP example below for usage

AMP example

let message = {
    from: 'Nodemailer <[email protected]>',
    to: 'Nodemailer <[email protected]>',
    subject: 'AMP4EMAIL message',
    text: 'For clients with plaintext support only',
    html: '<p>For clients that do not support AMP4EMAIL or amp content is not valid</p>',
    amp: `<!doctype html>
    <html ⚡4email>
        <meta charset="utf-8">
        <style amp4email-boilerplate>body{visibility:hidden}</style>
        <script async src=""></script>
        <script async custom-element="amp-anim" src=""></script>
        <p>Image: <amp-img src="" width="16" height="16"/></p>
        <p>GIF (requires "amp-anim" script in header):<br/>
          <amp-anim src="" width="500" height="350"/></p>

Header options

  • headers - An object or array of additional header fields (e.g. {“X-Key-Name”: “key value”} or [{key: “X-Key-Name”, value: “val1”}, {key: “X-Key-Name”, value: “val2”}]). Read more about custom headers here
  • messageId - optional Message-Id value, random value will be generated if not set
  • date - optional Date value, current UTC string will be used if not set
  • list - helper for setting List-* headers (see more here)

Other options

  • icalEvent - iCalendar event to use as an alternative. See details here
  • encoding - identifies encoding for text/html strings (defaults to ‘utf-8’, other values are ‘hex’ and ‘base64’)
  • textEncoding - force content-transfer-encoding for text values (either quoted-printable or base64). By default the best option is detected (for lots of ascii use quoted-printable, otherwise base64)

Support for different languages

Available module languages are implemented in the library i18n

  • en English
  • de German
  • ja Japanese
  • ru Russian
  • ua Ukrainian

Node Info

Version: 1.0.6
Updated 2 years, 3 months ago
License: Apache-2.0
Rating: 3.2 6




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