hashcash plugin for Nodemailer

This plugin adds hashcash headers for the Nodemailer generated e-mail messages.

NB! Generating hashcash values with JavaScript might be very slow (might take even 10s of seconds for a 20 bit hashcash value) and every recipient requires its own unique X-Hashcash header, so do not use this for messages with a large list of recipients.

Install

Install from npm

npm install nodemailer-hashcash --save

Usage

1. Load the hashcash function

var hashcash = require('nodemailer-hashcash');

2. Attach it as a 'compile' handler for a nodemailer transport object

nodemailerTransport.use('compile', hashcash(options));

Where

• options - is an optional options argument with the following values:
  • bits - (defaults to 20) how many bits to calculate

Example

var nodemailer = require('nodemailer');
var transporter = nodemailer.createTransport();
transporter.use('compile', hashcash());
transporter.sendMail({
    from: 'me@example.com',
    to: 'receiver@example.com',
    …
});

License

MIT