Add smtp-connection node package

Author: hoffmabc

package.json

@@ -37,6 +37,7 @@
     "request": ">=2.67.0",
     "safestart": "0.8.0",
     "sanitize-html": "^1.11.2",
+    "smtp-connection": "^2.5.0",
     "sortablejs": "^1.4.2",
     "taggle": "1.6.1",
     "underscore": "1.8.3",