[Juliate]

For producers, ignoring a SHOULD is riskier because it shifts the burden to every consumer.

For consumers, ignoring a SHOULD mostly affects their own robustness.

But here Google seems to understand it as a MUST... maybe the scale of spam is enough to justify it. Users are stuck between two parties that expect the other to behave.

[zer00eyz]

> maybe the scale of spam is enough to justify it.

This is 100 percent the case, and why these things are this way.

If you wanted to make email two point oh, I dont think it would look a lot like what we have today.

[pyrale]

> This is 100 percent the case, and why these things are this way.

But gmail accepts emails without message-id on personal mailboxes apparently.

[tracker1]

I think a mail 2.0 would be notify and pull based.... you notify a recipient's mail server that there's a message from <address> for them, then that server connects to the MX of record for the domain of <address> and retrieves <message-id> message.

Would this make mass emails and spam harder, absolutely. Would it be a huge burden for actual communications with people, not so much. From there actual white/black listing processes would work all that much better.

[DANmode]

https://jmap.io