Earlier quoted context omitted.
People keep banging on about "plain text, plain text" what is wrong with plain text? And what is wrong with SMTP? Also email attachments can be binary encoded, base64 is just one option. People are free to say that SMTP is "bad" or "broken" but they have to say exactly why that is the case. And "there are multiple different implementations" is a pretty poor justification, as a SMTP replacement would likely have the s…
Multiple implementations are a strength. In fact, you won't see a good replacement for SMTP without multiple independent implementations. (What will it look like? I would guess it will look like a two-part service, with one protocol for servers to talk to each other and another for clients to talk to servers. Servers will send tiny notifications to other servers that mail is available for their subscribers; then the…
I'd like to see the HTML that is supported in e-mails standardised, so there's no more issues about which clients will render what. I'd like to see the failure notices standardised, so that invalid e-mail addresses produce a standard "404-like" response, and so on.
The problem isn't so much that we have multiple implementations (I agree that can potentially be a strength). The problem is that there's very little that's consistent across the platforms.