advancements in tests and storing messages

back/mails/utils/statusUtils.js

@@ -0,0 +1,13 @@
+function isDmOnEnvelope(envelope) {
+    const members =
+        envelope.bcc?.length +
+        envelope.cc?.length +
+        envelope.to?.length +
+        envelope.sender?.length +
+        envelope.from?.length;
+    return members === 2;
+}
+
+module.exports = {
+    isDmOnEnvelope,
+};