diff --git a/app/components/autocomplete/at_mention/at_mention.js b/app/components/autocomplete/at_mention/at_mention.js
index c8478c2ae..c3b00754c 100644
--- a/app/components/autocomplete/at_mention/at_mention.js
+++ b/app/components/autocomplete/at_mention/at_mention.js
@@ -37,6 +37,7 @@ export default class AtMention extends PureComponent {
         value: PropTypes.string,
         isLandscape: PropTypes.bool.isRequired,
         nestedScrollEnabled: PropTypes.bool,
+        useChannelMentions: PropTypes.bool.isRequired,
     };
 
     static defaultProps = {
@@ -100,7 +101,7 @@ export default class AtMention extends PureComponent {
                     });
                 }
 
-                if (this.checkSpecialMentions(matchTerm)) {
+                if (this.props.useChannelMentions && this.checkSpecialMentions(matchTerm)) {
                     sections.push({
                         id: t('suggestion.mention.special'),
                         defaultMessage: 'Special Mentions',
diff --git a/app/components/autocomplete/at_mention/index.js b/app/components/autocomplete/at_mention/index.js
index 33b8ab5cd..011d23cf9 100644
--- a/app/components/autocomplete/at_mention/index.js
+++ b/app/components/autocomplete/at_mention/index.js
@@ -4,6 +4,7 @@
 import {bindActionCreators} from 'redux';
 import {connect} from 'react-redux';
 
+import {isMinimumServerVersion} from 'mattermost-redux/utils/helpers';
 import {autocompleteUsers} from 'mattermost-redux/actions/users';
 import {getCurrentChannelId, getDefaultChannel} from 'mattermost-redux/selectors/entities/channels';
 import {getCurrentTeamId} from 'mattermost-redux/selectors/entities/teams';
@@ -17,12 +18,26 @@ import {
 } from 'app/selectors/autocomplete';
 import {getTheme} from 'mattermost-redux/selectors/entities/preferences';
 
+import {haveIChannelPermission} from 'mattermost-redux/selectors/entities/roles';
+import {Permissions} from 'mattermost-redux/constants';
+
 import AtMention from './at_mention';
 
 function mapStateToProps(state, ownProps) {
     const {cursorPosition, isSearch} = ownProps;
     const currentChannelId = getCurrentChannelId(state);
 
+    let useChannelMentions = true;
+    if (isMinimumServerVersion(state.entities.general.serverVersion, 5, 22)) {
+        useChannelMentions = haveIChannelPermission(
+            state,
+            {
+                channel: currentChannelId,
+                permission: Permissions.USE_CHANNEL_MENTIONS,
+            },
+        );
+    }
+
     const value = ownProps.value.substring(0, cursorPosition);
     const matchTerm = getMatchTermForAtMention(value, isSearch);
 
@@ -47,6 +62,7 @@ function mapStateToProps(state, ownProps) {
         requestStatus: state.requests.users.autocompleteUsers.status,
         theme: getTheme(state),
         isLandscape: isLandscape(state),
+        useChannelMentions,
     };
 }
 
diff --git a/app/components/post_textbox/index.js b/app/components/post_textbox/index.js
index ac0878ab0..750fbc7e7 100644
--- a/app/components/post_textbox/index.js
+++ b/app/components/post_textbox/index.js
@@ -4,10 +4,12 @@
 import {bindActionCreators} from 'redux';
 import {connect} from 'react-redux';
 
-import {General} from 'mattermost-redux/constants';
+import {isMinimumServerVersion} from 'mattermost-redux/utils/helpers';
+import {General, Permissions} from 'mattermost-redux/constants';
 import {createPost} from 'mattermost-redux/actions/posts';
 import {setStatus} from 'mattermost-redux/actions/users';
 import {getCurrentChannel, isCurrentChannelReadOnly, getCurrentChannelStats} from 'mattermost-redux/selectors/entities/channels';
+import {haveIChannelPermission} from 'mattermost-redux/selectors/entities/roles';
 import {canUploadFilesOnMobile, getConfig} from 'mattermost-redux/selectors/entities/general';
 import {getTheme} from 'mattermost-redux/selectors/entities/preferences';
 import {getCurrentUserId, getStatusForUserId} from 'mattermost-redux/selectors/entities/users';
@@ -49,6 +51,17 @@ function mapStateToProps(state, ownProps) {
     const currentChannelMembersCount = currentChannelStats?.member_count || 0; // eslint-disable-line camelcase
     const isTimezoneEnabled = config?.ExperimentalTimezone === 'true';
 
+    let useChannelMentions = true;
+    if (isMinimumServerVersion(state.entities.general.serverVersion, 5, 22)) {
+        useChannelMentions = haveIChannelPermission(
+            state,
+            {
+                channel: currentChannel.id,
+                permission: Permissions.USE_CHANNEL_MENTIONS,
+            },
+        );
+    }
+
     return {
         currentChannel,
         channelId: ownProps.channelId || (currentChannel ? currentChannel.id : ''),
@@ -71,6 +84,7 @@ function mapStateToProps(state, ownProps) {
         currentChannelMembersCount,
         isTimezoneEnabled,
         isLandscape: isLandscape(state),
+        useChannelMentions,
     };
 }
 
diff --git a/app/components/post_textbox/post_textbox.test.js b/app/components/post_textbox/post_textbox.test.js
index aff9d8601..ba0f878bd 100644
--- a/app/components/post_textbox/post_textbox.test.js
+++ b/app/components/post_textbox/post_textbox.test.js
@@ -64,6 +64,9 @@ describe('PostTextBox', () => {
         valueEvent: '',
         isLandscape: false,
         screenId: 'NavigationScreen1',
+        currentChannelMembersCount: 50,
+        enableConfirmNotificationsToChannel: true,
+        useChannelMentions: true,
     };
 
     test('should match, full snapshot', () => {
@@ -117,6 +120,38 @@ describe('PostTextBox', () => {
         expect(Alert.alert).toHaveBeenCalledTimes(1);
     });
 
+    test('should send an alert when sending a message with a channel mention', () => {
+        const wrapper = shallowWithIntl(
+            <PostTextbox {...baseProps}/>,
+        );
+        const message = '@all';
+        const instance = wrapper.instance();
+        instance.handleTextChange(message);
+
+        expect(wrapper.state('value')).toBe(message);
+
+        instance.sendMessage();
+        expect(Alert.alert).toBeCalled();
+        expect(Alert.alert).toHaveBeenCalledWith('Confirm sending notifications to entire channel', expect.anything(), expect.anything());
+    });
+
+    test('should not send an alert when sending a message with a channel mention when the user does not have channel mentions permission', () => {
+        const wrapper = shallowWithIntl(
+            <PostTextbox
+                {...baseProps}
+                useChannelMentions={false}
+            />,
+        );
+        const message = '@all';
+        const instance = wrapper.instance();
+        instance.handleTextChange(message);
+
+        expect(wrapper.state('value')).toBe(message);
+
+        instance.sendMessage();
+        expect(Alert.alert).not.toHaveBeenCalled();
+    });
+
     test('should return correct @all (same for @channel)', () => {
         for (const data of [
             {
diff --git a/app/components/post_textbox/post_textbox_base.js b/app/components/post_textbox/post_textbox_base.js
index f15971796..4afefd337 100644
--- a/app/components/post_textbox/post_textbox_base.js
+++ b/app/components/post_textbox/post_textbox_base.js
@@ -98,6 +98,7 @@ export default class PostTextBoxBase extends PureComponent {
         currentChannel: PropTypes.object,
         isLandscape: PropTypes.bool.isRequired,
         screenId: PropTypes.string.isRequired,
+        useChannelMentions: PropTypes.bool.isRequired,
     };
 
     static defaultProps = {
@@ -573,7 +574,7 @@ export default class PostTextBoxBase extends PureComponent {
         const {value} = this.state;
 
         const currentMembersCount = this.props.currentChannelMembersCount;
-        const notificationsToChannel = this.props.enableConfirmNotificationsToChannel;
+        const notificationsToChannel = this.props.enableConfirmNotificationsToChannel && this.props.useChannelMentions;
         const toAllOrChannel = this.textContainsAtAllAtChannel(value);
 
         if (value.indexOf('/') === 0) {