Don't require the mailconfig, but log out in the console that it wont be enabled.

server/config/mailconfig.example.js

@@ -1,3 +1,9 @@
+/**
+ *
+ * Have a look at nodemailer's config on how to set this up https://nodemailer.com/about/
+ *
+ */
+
 var mail_config = {
     port: 587,
     host: 'smtp.example.com',

server/routing/api.js

@@ -1,15 +1,6 @@
 var express = require('express');
 var router = express.Router();
 var path = require('path');
-var nodemailer = require('nodemailer');
-try {
-   var mailconfig = require(path.join(__dirname, '../config/mailconfig.js'));
-} catch(e) {
-   console.log("Error - missing file");
-   console.log("Seems you forgot to create a mailconfig.js in /server/config/. Have a look at the mailconfig.example.js.");
-   process.exit();
-}
-
 
 router.use(function(req, res, next) {
    next(); // make sure we go to the next routes and don't stop here
@@ -42,53 +33,55 @@ router.route('/api/list/:channel_name').get(function(req, res) {
 
 router.route('/api/conf/:channel_name').get(function(req, res) {
    var channel_name = req.params.channel_name;
-   db.collection(channel_name).find({views: {$exists: true}},
+   db.collection(channel_name).find({views: {$exists: true}}, {
-      {
+      addsongs: 1,
-         addsongs: 1,
+      adminpass: 1,
-         adminpass: 1,
+      allvideos: 1,
-         allvideos: 1,
+      frontpage: 1,
-         frontpage: 1,
+      longsongs: 1,
-         longsongs: 1,
+      removeplay: 1,
-         removeplay: 1,
+      shuffle: 1,
-         shuffle: 1,
+      skip: 1,
-         skip: 1,
+      startTime: 1,
-         startTime: 1,
+      userpass: 1,
-         userpass: 1,
+      vote: 1,
-         vote: 1,
+      _id: 0
-         _id: 0
+   }, function(err, docs) {
-      }, function(err, docs) {
+      if(docs.length > 0) {
-         if(docs.length > 0) {
+         var conf = docs[0];
-            var conf = docs[0];
+         if(conf.adminpass != "") {
-            if(conf.adminpass != "") {
+            conf.adminpass = true;
-               conf.adminpass = true;
-            } else {
-               conf.adminpass = false;
-            }
-            if(conf.userpass != "") {
-               conf.userpass = true;
-            } else {
-               conf.userpass = false;
-            }
-            res.setHeader('Content-Type', 'application/json');
-            res.send(JSON.stringify(conf));
          } else {
-            res.status(404);
+            conf.adminpass = false;
-            res.send(404);
          }
+         if(conf.userpass != "") {
+            conf.userpass = true;
+         } else {
+            conf.userpass = false;
+         }
+         res.setHeader('Content-Type', 'application/json');
+         res.send(JSON.stringify(conf));
+      } else {
+         res.status(404);
+         res.send(404);
+      }
+   });
+});
+
+router.route('/api/imageblob').post(function(req, res) {
+   var Jimp = require("jimp");
+   Jimp.read('https://img.youtube.com/vi/' + req.body.id + '/mqdefault.jpg', function (err, image) {
+      if (err) console.log(err);
+      image.blur(50)
+      .write(path.join(pathThumbnails, '/public/assets/images/thumbnails/' + req.body.id + '.jpg'), function(e, r) {
+         res.send(req.body.id + ".jpg");
       });
    });
+});
 
-   router.route('/api/imageblob').post(function(req, res) {
+var nodemailer = require('nodemailer');
-      var Jimp = require("jimp");
+try {
-      Jimp.read('https://img.youtube.com/vi/' + req.body.id + '/mqdefault.jpg', function (err, image) {
+   var mailconfig = require(path.join(__dirname, '../config/mailconfig.js'));
-         if (err) console.log(err);
-         image.blur(50)
-         .write(path.join(pathThumbnails, '/public/assets/images/thumbnails/' + req.body.id + '.jpg'), function(e, r) {
-            res.send(req.body.id + ".jpg");
-         });
-      });
-   });
-
 
    router.route('/api/mail').post(function(req, res) {
       let transporter = nodemailer.createTransport(mailconfig);
@@ -119,5 +112,14 @@ router.route('/api/conf/:channel_name').get(function(req, res) {
          }
       });
    });
+} catch(e) {
+   console.log("Mail not setup and wont work");
+   console.log("Seems you forgot to create a mailconfig.js in /server/config/. Have a look at the mailconfig.example.js.");
+   router.route('/api/mail').post(function(req, res) {
+      console.log("Someone tried to send a mail, but the mailsystem hasn't been enabled..")
+      res.send("failed");
+      return;
+   });
+}
 
-   module.exports = router;
+module.exports = router;