Nodemailer and "SSL23_GET_SERVER_HELLO: unknown protocol" error

Question

Below is my Node.js code. Using the code results in:

Error: 0:error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:openssl\ssl\s23_clnt.c:794

Here is the code:

 var express = require('express') , fs = require("fs") , app = express() , path = require('path') , request = require('request') , bodyParser = require('body-parser') , http = require('http') , server = http.createServer(app) , io = require('socket.io').listen(server, {log: true, origins: '*:*'}) ; var smtpTransport = require('nodemailer-smtp-transport'); var options = { key : fs.readFileSync('server.key'), cert : fs.readFileSync('server.crt') }; var nodemailer = require('nodemailer'); var sendmailTransport = require('nodemailer-sendmail-transport'); var emailserver = nodemailer.createTransport(smtpTransport({ service: 'Gmail', port: 25, strictSSL: false, host:'smtp.gmail.com', SSL Protocol: 'off', TLS Protocol: ON, auth: { user: '[e-mail]', pass: 'mypassword' }, tls: {ciphers: "SSLv3"} })); 

How to solve this error?

Answer 1

Use it, it works

 var nodemailer = require('nodemailer'); var smtpTransport = nodemailer.createTransport("SMTP", { service: "Gmail", connectionTimeout : "7000", greetingTimeout : "7000", auth: { XOAuth2: { user: "email id", clientId: "client id", clientSecret: "secret", refreshToken: "refresh token" } } }); 

Answer 2

I had this error using third-party smtp with the module 'nodemailer-smtp-transport' node.

My problem was that I used port 587.

When I switched it to 465, everything started to work.

My configuration looks like this:

 const smtpConfiguration = { host: '<my smtp host>', port: 465, secure: true, // use TLS auth: { user: '<user account>', pass: '<password>' } }; 

And my email function (typescript, bluebird Promise):

 export const SendEmail = (from:string, to:string[], subject:string, text:string, html:string) => { const transportOptions = smtpConfiguration; const transporter = nodemailer.createTransport(smtpTransport(transportOptions)); const emailOptions = { from: from, to: to.join(','), subject: subject, text: text, html: html }; return new Promise((resolve, reject) => { transporter.sendMail(emailOptions, (err, data) => { if (err) { return reject(err); } else { return resolve(data); } }); }); }; 

Answer 3

I encountered a similar problem

resolved using thread

 // For port 465 var transporter = nodemailer.createTransport({ host: 'smtp.hostname', port: 465, secure: true, auth: { user: 'email', pass: 'password' } }); // for port 587 or 25 or 2525 etc. var transporter = nodemailer.createTransport({ host: 'smtp.hostname', port: 587, secure: false, requireTLS: true, // only use if the server really does support TLS auth: { user: 'email', pass: 'password' } }); 

Answer 4

It looks like you are making it a little harder than necessary. I am successfully using this with Nodemailer version 0.7.0.

 var smtpTransport = nodemailer.createTransport("SMTP", { service: "Gmail", auth: { user: "***@gmail.com", pass: "****" } }); var mailOptions = { from: "****@gmail.com", to: to, subject: 'Subject Line!', text: 'Alternate Text', html: '<label>Hello!</label>' } smtpTransport.sendMail(mailOptions, function(error, response) { if (error) { console.log(error); } else { console.log("Message sent: " + response.message); } // if you don't want to use this transport object anymore, uncomment following line smtpTransport.close(); // shut down the connection pool, no more messages callback(); }); 

Answer 5

Your problem is most likely SSLv3. Most servers are down .

 TLS Protocol: ON, auth: { user: '[e-mail]', pass: 'super-secret-password' }, tls: {ciphers: "SSLv3"} 

You must use TLS 1.0 and above.

You should also use the server name or SNI , but I do not know how to tell Node.js to use it.