Why am I getting an NodeMailer HELO 501 hostname error? - node.js

Question

I am getting an NodeMailer error when I try to connect to my NodeMailer SMTP server (which happens to be on the same machine):
error: { Error: Invalid HELO. response=501 Error: Syntax: HELO hostname: 501 Error: Syntax: HELO hostname
at SMTPConnection._actionHELO (/home/hunter/projects/proxy-e/node_modules/nodemailer/lib/smtp-connection/index.js:1139:27)
at SMTPConnection._processResponse (/home/hunter/projects/proxy-e/node_modules/nodemailer/lib/smtp-connection/index.js:762:20)
at SMTPConnection._onData (/home/hunter/projects/proxy-e/node_modules/nodemailer/lib/smtp-connection/index.js:558:14)
at TLSSocket._socket.on.chunk (/home/hunter/projects/proxy-e/node_modules/nodemailer/lib/smtp-connection/index.js:510:47)
at TLSSocket.emit (events.js:182:13)
at addChunk (_stream_readable.js:283:12)
at readableAddChunk (_stream_readable.js:264:11)
at TLSSocket.Readable.push (_stream_readable.js:219:10)
at TLSWrap.onread (net.js:639:20)
code: 'EPROTOCOL',
response: '501 Error: Syntax: HELO hostname',
responseCode: 501,
command: 'HELO' }
I am attempting to connect via:
let optionsTwo = {
port: 465,
host: 'mydomain.com',
secure: true,
name: 'mydomain.com',
transactionLog: true,
debug: true,
};
const connection = new SMTPConnection(optionsTwo);
connection.connect(function() {
console.log("connected?");
let authTwo = {
user: 'foo',
pass: 'bar'
};
connection.login(authTwo, function(err) {
if (err) {
console.log("err::", err);
}
console.log("logged in?");
});
});
connection.on("error", function(err) {
console.log("error: ", err);
});
My NodeMailer server:
let options = {
secure: false,
authOptional: false,
secure: true,
key: hskey,
cert: hscert,
ca: [hschain],
onAuth(auth, session, callback) {
...
},
}
const emailServer = new SMTPServer(options);
emailServer.listen(465);
My server has a registered domain name and a certificate from LetsEncrypt. I haven't been able to figure out why I continue to get this HELO hostname 501 error. From digging into the NodeMailer JS files I found this:
Handles server response for STARTTLS command. If there's an error
* try HELO instead, otherwise initiate TLS upgrade. If the upgrade
* succeedes restart the EHLO
Which makes me assume that STARTTLS has some sort of error so it's attempting to use HELO and failing, but why?

Answer 1

For some reason name: 'mydomain.com', is incorrect, and when removing it, I no longer get the error.