Send mail without SMTP server
npm install sendmail
sendmail = require('sendmail')();
sendmail({
from: 'no-reply@yourdomain.com',
to: 'test@qq.com, test@sohu.com, test@163.com ',
subject: 'test sendmail',
content: 'Mail of test sendmail ',
}, function(err, reply) {
console.log(err && err.stack);
console.dir(reply);
});