Meteor.startup(function () {

  process.env.MAIL_URL = 'smtp://postmaster%40sandbox46c5050bc63a4a9a99bd87aab077ab33.mailgun.org:6b8d4fe6d43901076acfdbe1507dbea7@smtp.mailgun.org:587';
});
// In your server code: define a method that the client can call
Meteor.methods({
  sendEmail: function (to, from, subject, text) {
    // check([to, from, subject, text], [String]);
    this.unblock();

    Email.send({
      to: to,
      from: from,
      subject: subject,
      text: text
    });
  }
});