Please could you add a marker icon on a idea comment which has be sent by mail? We use this function a lot, but after saving the comment (and automatically sending it to the customer), we cannot see if it is sent (or if we forget to check the checkbox).
It should be totally great if the marker informs us about delivery errors, but that is not our first priority. If we can see the mail is sent, we are still very happy ;-)
Currently, any public comments made are automatically emailed to idea subscribers. Private comments are automatically emailed to any watchers of the idea.
With this in mind, we don't have plans for additional marker icons but hope that this information can help to bring assurance that comments will be emailed out.