Sending and Receiving Messages

Available in Mattermost Free and Starter subscription plans. Available for Mattermost Cloud deployments. Available for Mattermost Self-Hosted deployments.

Sending messages and replying to messages are important ways to keep conversations active with your team. You can edit and delete messages after you’ve sent them.


Your System Admin may restrict Messaging actions, such as editing or deleting messages, by configuring Advanced Permissions, available in Mattermost Enterprise and Professional subscription plans.

Send a message

Write a message by typing into the text input box, then press ENTER to send it. Use SHIFT+ENTER to create a new line without sending a message. To send messages by pressing CTRL+ENTER, go to Settings > Advanced > Send Messages on CTRL/CMD+ENTER > Edit.


Mattermost can automatically detect and display messages written using right-to-left scripts, such as Arabic, Hebrew, or Persian. Your System Admin must install the RTL Plugin to enable this functionality.

Reply to messages


An early access beta of Collapsed Reply Threads is available for Mattermost Cloud and Mattermost self-hosted customers from v5.37 offering a new way to organize conversations within channels. See our Organizing Conversations using Collapsed Reply Threads (Beta) documentation to learn more.

You can reply to a message by hovering over a message and selecting the Reply link to organize the conversation into a thread.

Reply to Mattermost messages

Threaded conversations are easy to follow and allow multiple parallel conversations to occur at the same time without confusion. Replies are indented slightly in the center pane to indicate that they are child messages of a parent message.

Selecting the reply link opens a sidebar in the right-hand sidebar. To expand the right-hand sidebar to its full width, select the Expand icon with two arrows at the top of the sidebar.

Expand right-hand sidebar to its full width

To shrink the right-hand sidebar to its original width, select the same Collapse icon.

Collapse the right-hand sidebar to its original width

Edit or delete messages

Select the More Actions link next to a message that you’ve sent.

More actions you can take with your messages

Select Edit to edit your own messages. Message edits do not trigger new @mention notifications, desktop notifications, or notification sounds.

Select Delete to delete your own messages. Select Delete again to confirm.

Mark messages as unread

Marking a message as unread bolds the channel in your sidebar, and adds the new messages line above the marked message. This can be a useful reminder to follow-up on the message later if you don’t have time to address it when the message was read.

Select the More Actions link next to a message, then select Mark as Unread.