
Product
Introducing Reports: An Extensible Reporting Framework for Socket Data
Explore exportable charts for vulnerabilities, dependencies, and usage with Reports, Socket’s new extensible reporting framework.
dkim-signer
Advanced tools
Sign RFC822 messages with DKIM. This module is extracted from mailcomposer.
// require signer function
var DKIMSign = require("dkim-signer").DKIMSign;
// generate a RFC822 message
var rfc822message = "Subject: test\r\n\r\nHello world";
// setup DKIM options
var dkimOptions = {
domainName: "müriaad-polüteism.info",
keySelector: "dkim",
privateKey: require("fs").readFileSync("./test_private.pem")
};
// generate signature header field
var signature = DKIMSign(rfc822message, dkimOptions);
// join signature header field with the message
console.log(signature + "\r\n" + rfc822message);
MIT
Nodemailer is a module for Node.js applications to allow easy email sending. It supports various transport methods, including SMTP, and can be extended with plugins for additional functionality like DKIM signing. Compared to dkim-signer, Nodemailer is more comprehensive and can handle the entire email sending process, not just DKIM signing.
EmailJS is a library for sending emails from JavaScript applications. It supports SMTP and can be configured to use DKIM for signing emails. While it provides a broader range of email functionalities, it is not as specialized in DKIM signing as dkim-signer.
Mailcomposer is a Node.js module for generating email messages, including support for attachments and DKIM signing. It is more focused on email composition and can be used in conjunction with other modules for sending emails. Compared to dkim-signer, it offers more features for email creation but requires additional setup for sending emails.
FAQs
DKIM signing code extracted from mailcomposer
The npm package dkim-signer receives a total of 170,091 weekly downloads. As such, dkim-signer popularity was classified as popular.
We found that dkim-signer demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?

Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.

Product
Explore exportable charts for vulnerabilities, dependencies, and usage with Reports, Socket’s new extensible reporting framework.

Product
Socket for Jira lets teams turn alerts into Jira tickets with manual creation, automated ticketing rules, and two-way sync.

Company News
Socket won two 2026 Reppy Awards from RepVue, ranking in the top 5% of all sales orgs. AE Alexandra Lister shares what it's like to grow a sales career here.