Documenting some enhancments

Author: jimmypuckett

src/MailTracking.php

@@ -25,6 +25,15 @@
  */
 trait MailTracking
 {
+    // TODO: Add check for attachments (number of & name)
+    // TODO: Add check for BCC
+    // TODO: Add check for CC
+    // TODO: Add check for header
+    // TODO: Add check for message type
+    // TODO: Add check for Priority
+    // TODO: Add check for ReplyTo
+    // TODO: Allow checking specific message not just most recent one
+
     /**
      * Delivered emails.
      *