eMail is a lot like SMS within cell/mobile phone networks, it was never made extensible and therefore inherently lacks some functionality that would be fairly s

eMail is a lot like SMS within cell/mobile phone networks, it was never made extensible and therefore inherently lacks some functionality that would be fairly simple to implement using todays ideas and tools, for example simple encryption and reliable end to end delivery for eMail would be great! In the cell/mobile networks we are seeing legacy services like SMS been slowly replaced with better alternatives like Facetime, Whatsapp & Skype etc... However this change is been driven by users partly because of the increased functionality that these services have to offer, but most of all because of the cheaper cost to the end user. Unfortunately because eMail is natively free the majority of users will just make do with what they already are successfully using, even if it's a bit clunky and lacking features. Ultimately 99% of people on the web probably have an eMail account, which provides a massive barrier to any new alternatives out there, no matter what feature set that they have.