python-spfcheck2

Node.js wrapper around Python's spf.check2 function which conforms to both RFC4408 and RFC7208

Table of Contents

• Requirements
• Install
• Usage
• Contributors
• License

Requirements

1. Ensure that you have a Python version of >= 3.5 installed per pyspf requirements (note that Python v3 is required because of a bug with DNS recursive CNAME lookups on v2.7):

   python3 --version

2. Install the packages pyspf and dnspython:

   pip3 install pyspf
   pip3 install dnspython

Install

npm:

npm install python-spfcheck2

yarn:

yarn add python-spfcheck2

Usage

const spfCheck2 = require('python-spfcheck2');

const ip = '69.55.226.139';
const address = 'terry@wayforward.net';
const host = 'mx1.wayforward.net';

// then/catch usage
spfCheck2(ip, address, host)
  .then([result, explanation] => console.log(result, explanation))
  .catch(console.error);

// async/await usage
(async () => {
  try {
    const [ result, explanation ] = await spfCheck2(ip, address, host);
    console.log(result, explanation);
  } catch (err) {
    console.error(err);
  }
})();

Note that result is a String (which also corresponds to a particular explanation), see table below for the full list:

Result	Explanation
pass	sender SPF authorized
fail	SPF fail - not authorized
neutral	permanent error in processing
softfail	domain owner discourages use of this host
permerror	permanent error in processing
temperror	temporary DNS error in processing
none
local	No SPF result due to local policy
trusted	No SPF check - trusted-forwarder.org
ambiguous	No error, but results may vary

An error is thrown if the child process itself (spf.check2) errors.

Contributors

Name	Website
Nick Baugh	http://niftylettuce.com/

License

MIT © Nick Baugh