.. and it's funny how a system where there are no guarantees of delivery (people email to reach their inbox in seconds, but the delivery time is not guaranteed

.. and it's funny how a system where there are no guarantees of delivery (people email to reach their inbox in seconds, but the delivery time is not guaranteed at all, nor is delivery!), no privacy (IMHO most emails are transported in plain text and one only needs to sniff the traffic..), and no guarantee of authenticity (you can send an email with any "FROM" address, pretty much), well how a system like that can in fact be incredibly useful. Of course, the layman thinks all these things are in fact guaranteed...