Node.jsスパムフィルターライブラリ

npm install spamscanner

import SpamScanner from 'spamscanner';

const scanner = new SpamScanner();
const result = await scanner.scan(rawMessage);

if (result.isSpam) {
  console.log(result.score, result.tests.map(test => test.name));
}

import {SMTPServer} from 'smtp-server';
import SpamScanner from 'spamscanner';

const scanner = new SpamScanner({authentication: true});

const server = new SMTPServer({
  async onData(stream, session, callback) {
    const result = await scanner.scan(stream, {
      session: {
        remoteAddress: session.remoteAddress,
        helo: session.hostNameAppearsAs,
        envelope: session.envelope,
      },
    });

    if (result.action === 'reject') {
      return callback(Object.assign(new Error('Message rejected as spam'), {responseCode: 451}));
    }

    callback();
  },
});

await scanner.learn(rawMessage, 'spam');
scanner.saveModel('./model.json');

const trained = new SpamScanner({classifier: './model.json'});