Tbh I wish SMTP had died a long time ago. It's the reason email is so terribly broken. We can't trust a sender is who they say they are. We can't stop spammers, we can't hide personal info, there is no e2e encryption. As a result everyone is afraid of clicking on links and companies no longer send confidential info through it. It's just a fancy notification service now ("there's a message waiting for you at our portal" crap). I understand why they do it but it's really poor UX having to log into portals just to read a message.
Of all the original internet protocols, SMTP is the ice that needs replacement the most IMO.
Of all the original internet protocols, SMTP is the ice that needs replacement the most IMO.