Immediately after Microsoft announced that Clutter was available, I enabled it in all my personal tenants and started training it. As you may recall, you can train Clutter in two ways: implicitly (as it sees how you interact with mail from particular senders, such as by ignoring it or deleting it without reading it) or explicitly (by moving messages into or out of the Clutter folder). Because I’m fairly impatient, I set about explicit training by moving messages to the Clutter folder. I’ve done this with all of the clients I use: Outlook for Mac, OWA, Outlook 2013, the iOS mail app, and Outlook Mobile. Whenever possible I move the message while leaving it unread, so as not to make Clutter think I’m interested.

The upshot: it works reasonably well, but it seems to have trouble learning about messages from some sources. For example, both Strava and Twitter alerts remain…