[ChuckMcM]

I wonder though if they have taken it out of the filter flow. Filters are interesting in that they can really slow things down, and if a previous one fires before the send to trash one does, sometimes it has a different result. If they have called this out as a behavior that can happen on the inbound pipeline, and more importantly if they can reflect it back as a 5xx error to the sender, it would be nice improvement.

[nattaylor]

Seems like the Inbox team has rethought the filter flow at least in terms of UI and there are clearly some architecture/backend changes too. Perhaps this new "block" flow in GMail is a reflection of working together with the Inbox team.