add smtp.port configuration for non-standard smtp ports

lib/configuration.js

@@ -114,7 +114,8 @@ var conf = module.exports = convict({
   smtp: {
     host: 'string?',
     user: 'string?',
-    pass: 'string?'
+    pass: 'string?',
+    port: 'integer = 25'
   },
   statsd: {
     enabled: {

lib/email.js

@@ -13,7 +13,10 @@ logger = require('./logging.js').logger;
 /* if smtp parameters are configured, use them */
 try { var smtp_params = config.get('smtp'); } catch(e) {};
 if (smtp_params && smtp_params.host) {
-  emailer.SMTP = { host: smtp_params.host };
+  emailer.SMTP = {
+    host: smtp_params.host,
+    port: smtp_params.port
+  };
   logger.info("delivering email via SMTP host: " +  emailer.SMTP.host);
   if (smtp_params.user) {
     emailer.SMTP.use_authentication = true;