(Node.js) Get SpamAssassin Score for an Email

Uses Postmark’s spam API (a RESTfull interface to the SpamAssassin filter tool) to analyze an email to get a spam score.

Install Chilkat for Node.js and Electron using npm at

Chilkat npm packages for Node.js
Chilkat npm packages for Electron
on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var success;

    // First build an email to check.
    var email = new chilkat.Email();
    email.Subject = "this is a test";
    email.From = "support@chilkatsoft.com";
    email.AddTo("John Doe","john@example.com");
    email.AddPlainTextAlternativeBody("this is a test");
    email.AddHtmlAlternativeBody("<html><body><b>Hello John!</b><p>This is a test</p></body></html>");
    success = email.AddFileAttachment2("qa_data/jpg/starfish.jpg","image/jpeg");

    // Check this email by implementing this curl command:

    // curl -X POST "https://spamcheck.postmarkapp.com/filter"
    // -H "Accept: application/json"
    // -H "Content-Type: application/json"
    // -v
    // -d '{"email":"raw dump of email", "options":"short"}'

    var json = new chilkat.JsonObject();
    json.UpdateString("email",email.GetMime());
    json.UpdateString("options","short");

    var http = new chilkat.Http();
    // resp: HttpResponse
    var resp = http.PostJson3("https://spamcheck.postmarkapp.com/filter","application/json",json);
    if (http.LastMethodSuccess !== true) {
        console.log(http.LastErrorText);
        return;
    }

    console.log("response status code = " + resp.StatusCode);
    console.log("response body: ");
    console.log(resp.BodyStr);


}

chilkatExample();