Allow Channel Admins to be able to enter "select" or "edit" mode where checkboxes appear next to the messages.
Admins would be able to select messages one by one or to select a range of messages by clicking the first one, holding Shift button and selecting the last one (like we've used from other software).

After selecting multiple messages, Admins would be able to delete them at once, or perform any other action that might be implemented during the development (move, archive, flag, something else).

This feature would make it a lot easier to delete whole bunches of off-topic messages and make all the channels cleaner and easier to use - both from user and admin point of view.

Hopefully it was helpful :)
Best

Member list on side of chat window w/ status indicator

Show a member list on the side of the chat window listing all the users that are in the current room, sorted by status and then name (so that logged out users are at the bottom).

This seems critical to communication .. who's in the room, who's online, who am I talking to, am I in the right room before typing @everyone, etc. At a glance. The little member button with drop down is insufficient especially in rooms with hundreds of people.

This is a repost, but the original is closed but was not fixed.

Mattermost is intended to be team collaboration and messaging tool.
It functions fine when working with channels which are similar to forums or IRC channels.

But when sending direct messages, the user experience is quite bad because desktop notifications disappear after 5 seconds and when user is concentrating to something else or is AFK he will miss the notification and doesn't know that someone is trying to reach him.

It would be great if there was a configuration option where user can choose how long the notification should be displayed.

This feature was already implemented in v3.4, but was removed later.

See https://mattermost.uservoice.com/forums/306457-general/suggestions/9182981-add-notification-persistence-preference-to-configu
https://mattermost.uservoice.com/forums/306457-general/suggestions/15179742-make-notification-about-new-message-persistent

Original issue: https://github.com/mattermost/mattermost-server/issues/9823
https://mattermost.uservoice.com/forums/306457-general/suggestions/35827000-add-notification-timeout-option

When rejoining a conversation after many new messages have been posted, if you want to catch up on what you missed, you have to scroll up to the top, click the 'load more messages' button, scroll up to the top, click 'load more messages, ad nauseum, till eventually you reach a point where the "New Messages" line is no longer at the top, then scroll back down till you find the "New Messages" line again.

I think it would be very useful if there was a button (I would name it "load new messages") that appeared along with the 'load more messages' button when the first new message is above the first visible message, that would load all the way back to first new message with a single click.

implement threads in slack import tool.

right now, threaded messages lose their context when imported. they just become normal messages and not replies to other messages.

https://github.com/mattermost/mattermost-server/issues/10203

https://api.slack.com/docs/message-threading

in slack, replies are standalone objects. it works via a `thread_ts` (thread timestamp) attribute. `thread_ts` refers to the `ts` (timestamp) of the parent post. if a post has `thread_ts` == `ts`, then it is the beginning of a thread.

possible approach:
import all posts except for ones where `thread_ts` != `ts` (as these are replies to other posts). once that's done, go back and import the replies since their parents will have already been imported.

We use Mattermost in a small team and when it comes the time to chill out, we sometimes abuse of the #random channel
We loved the emoticon customization and we would love to see the possibility to send a sound to react to a message with the right movie quote for example.

That could be a plugin with a command like /play, I just doubt that the plugin would have the right to play a sound in browser.

The sound (and the command) could be created by users just like emoticons. The user should have to upload a sound file (like .mp3) and defines its label. Then, he could types /play my-custom-label-sound to trigger it.

Of course, a preference to disable those sound or only enable them when the user have the focus on the channel should be present.

You can delay a message for 5 seconds with this syntax:
/echo "This multiline message
is delayed" 5

Today the delay limit is 10000 seconds (~2 hours 45 minutes). This is to short. This should be increased to at least a few days, but why not a week or more (so the message is sent after the vacation is over)?

Sometimes when you got a message, you don't want to disturb the receiver at this time (e.g. in weekends or in vacations) or you got a better strategic moment to submit an idea. Then it would be very handy to delay your message/idea until your desired moment.