A function to mark messages to be handled later would be very useful. If you get a message with a task and you can't handle it instantly it would be great to mark it, f.e. with a star, to find it later easily. And if you could generate a list with all marked messages to have a "task list" this would be best!
Thanks to your votes, flagged messages is now available in Mattermost 3.3!
Could we ask your help re-tweet the announcement? https://twitter.com/mattermosthq/status/765566741921406976