We need to update email protocol to help reduce information overload

If you notice about receiving notifications in your phone from apps or from services like twitter, it is often seen as a stream of notifications. Missing some will not cause problems. However this is not the case for emails. Thus if left unattended can lead to information overload. Don't you think we need to update email to make it more human friendly from an information overload perspective? Here is some potential ideas: - Metadata by responsible sender to suggest when to self delete if required. - Metadata by responsible sender to suggest visual priority. e.g. show a notification in notification bar, but without alerting user. - Metadata for allowing sender to assign tags/categories. You can then use tags to adjust priority of different types of emails. There is a regular tags defined by the email standard, and a flexible tags which are utf-8 strings that are not covered under the standard. Obviously this is based on how responsible the sender is, but if they are not responsible you can always press the spam button. (side note: Should email also be extended to allow for subscription? e.g. like twitter). So what's your idea? And how do we push for these changes?