Change mail options

src/libs/middlewares/email.js

@@ -22,13 +22,13 @@ transporter.verify(function(error, success) {
    }
 });
 
-let mailOptions = {
+const mailOptions = {
     from: config.email.from
 };
 
 module.exports = function send(options, cb) {
-    Object.assign(options, mailOptions);
-    transporter.sendMail(options, (err, info) => {
+    let opt = Object.assign({}, mailOptions, options);
+    transporter.sendMail(opt, (err, info) => {
         if(err) {
             return cb(err);
         }