title: Email send through nodemailer goes into spam for gmail
body: <p>I am sending email through nodemailer it goes into inbox of gmail if i run from local server but goes into spam of gmail if i run script from microsoft azure server.
  following is my script</p>
  
  <pre><code>var nodemailer = require('nodemailer');
  var EmailTemplates = require('swig-email-templates');
  var smtpConfig =  {
          service: 'smtp.office365.com',
          host: 'smtp.office365.com',
          port: 587,
          starttls: {
              enable: true
          },
          secureConnection: true,
          auth: {
              user: 'xxxxx@yyyy.com',
              pass: 'zzzzzz'
          }
      }
  
  var templates = new EmailTemplates();  
  var transporter = nodemailer.createTransport(smtpConfig);   
  
  var context = {
    username:'Rajesh',
    email:'xxxxx@gmail.com',
    link : 'www.google.co.in'
  };
  
  templates.render('activate_email.html', context, function(err, html,text, subject) {    
  
    transporter.sendMail({
      from: '"Product Name" &lt;no-reply@xxxxx.com&gt;', // sender address
      to: 'xxxx@gmail.com',
        subject: 'Account activation',
        html: html,
        text:text    
    });    
  });
  </code></pre>