Posted by thatha7777 17 hours ago
I suspect viva.com didn't consider the full implications, and I suspect Google did some hard math on hours saved for their customers
My opinion is that Postel's law should be approached in the same way that Linus Torvalds did CVS when designing Git. If in doubt about an implementation decision, consider what Postel's law would recommend, and then do the exact opposite.
I say this lovingly, having significant German ancestry:)
But taking a step back :
did viva previously send message ids and pushed a change to prod to strip it? Was it on purpose or an accident?
And other email providers like proton or Hotmail - do they accept messages without message ids?
Have other clients of Google workspace complained about this issue?