Tukukkk

I want to be able to send emails from my local domain without using gmail or other SMTP servers.

I'm currently using SendMail:

const sendmail = require('sendmail') ({

    logger: {

        debug: console.log,

        info: console.info,

        warn: console.warn,

        error: console.error

    },

    dkim: {

        privateKey: dkimPrivateKey,

        keySelector: 'default'

    },

});





sendmail({

        from: 'foo@mydomain.com',

        to: 'mygmail@gmail.com',

        subject: 'test sendmail',

        html: 'Mail of test sendmail ',

    }, function(err, reply) {

        console.log(err && err.stack);

        console.dir(reply);

});

and this DOES work, BUT when I receive the email in my Gmail account, and I view the message information, Google is marking this as 'security: No encryption'

From what I understand I need to use TLS to create a 'secure' connection. I already have a certificate and keys from LetsEncrypt and my domain is already using HTTPS. How do I encrypt/use TLS my outgoing emails?

Or is there a better package for this? I've tried using NodeMailer and my emails only get added to a 'queue' and never sent.

The TLS encryption doesn't have to do anything with the HTTP certificates. This works with STARTTLS. Did you found any reason for queuing in the maillog? Hope the ports are not blocked.
You can try out this Node library: https://github.com/pepipost/pepipost-sdk-nodejs

It does TLS encryption and works over HTTP instead of SMTP.