var transport = nodemailer.createTransport({ host: ‘mailtrap.io’, port: 2525, auth: { user: ‘your-mailtrap-inbox-username’, pass: ‘your-mailtrap-inbox-pass’ } }); transport.sendMail({ … }); Mailtrap is a fake SMTP server for development teams to test, view and share emails sent from the development and staging environments without spamming real customers. Now this is great for testing: use mailtrap’s SMTP server …