diff --git a/detox/e2e/support/server_api/channel.js b/detox/e2e/support/server_api/channel.js
index 22292aad2..b55b2a3ce 100644
--- a/detox/e2e/support/server_api/channel.js
+++ b/detox/e2e/support/server_api/channel.js
@@ -40,6 +40,23 @@ export const apiCreateChannel = async ({teamId = null, type = 'O', prefix = 'cha
     }
 };
 
+/**
+ * Get a channel by name and team name.
+ * See https://api.mattermost.com/#tag/channels/paths/~1teams~1name~1{team_name}~1channels~1name~1{channel_name}/get
+ * @param {string} teamName - team name
+ * @param {string} channelName - channel name
+ * @return {Object} returns {channel} on success or {error, status} on error
+ */
+export const apiGetChannelByName = async (teamName, channelName) => {
+    try {
+        const response = await client.get(`/api/v4/teams/name/${teamName}/channels/name/${channelName}`);
+
+        return {channel: response.data};
+    } catch (err) {
+        return getResponseFromError(err);
+    }
+};
+
 /**
  * Add user to channel.
  * See https://api.mattermost.com/#tag/channels/paths/~1channels~1{channel_id}~1members/post
@@ -76,6 +93,7 @@ function generateRandomChannel(teamId, type, prefix) {
 export const Channel = {
     apiAddUserToChannel,
     apiCreateChannel,
+    apiGetChannelByName,
 };
 
 export default Channel;
diff --git a/detox/e2e/support/server_api/index.js b/detox/e2e/support/server_api/index.js
index 12e9ec633..64779a08d 100644
--- a/detox/e2e/support/server_api/index.js
+++ b/detox/e2e/support/server_api/index.js
@@ -2,6 +2,7 @@
 // See LICENSE.txt for license information.
 
 import Channel from './channel';
+import Post from './post';
 import Setup from './setup';
 import System from './system';
 import Team from './team';
@@ -9,6 +10,7 @@ import User from './user';
 
 export {
     Channel,
+    Post,
     Setup,
     System,
     Team,
diff --git a/detox/e2e/support/server_api/post.js b/detox/e2e/support/server_api/post.js
new file mode 100644
index 000000000..99bf5a9f7
--- /dev/null
+++ b/detox/e2e/support/server_api/post.js
@@ -0,0 +1,54 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import client from './client';
+import {getResponseFromError} from './common';
+
+// ****************************************************************
+// Channels
+// See https://api.mattermost.com/#tag/channels
+//
+// Exported API function should have the following:
+// - documented using JSDoc
+// - meaningful description
+// - match the referenced API endpoints
+// - parameter/s defined by `@param`
+// - return value defined by `@return`
+// ****************************************************************
+
+/**
+ * Get posts for a channel.
+ * See https://api.mattermost.com/#tag/posts/paths/~1channels~1{channel_id}~1posts/get
+ * @param {string} channelId - The channel ID to get the posts for
+ * @return {Object} returns {posts} on success or {error, status} on error
+ */
+export const apiGetPostsInChannel = async (channelId) => {
+    try {
+        const response = await client.get(`/api/v4/channels/${channelId}/posts`);
+
+        const {order, posts} = response.data;
+
+        const orderedPosts = order.map((postId) => posts[postId]);
+
+        return {posts: orderedPosts};
+    } catch (err) {
+        return getResponseFromError(err);
+    }
+};
+
+/**
+ * Get last post in a channel.
+ * @param {string} channelId - The channel ID to get the the last post
+ * @return {Object} returns {post} on success or {error, status} on error
+ */
+export const apiGetLastPostInChannel = async (channelId) => {
+    const {posts} = await apiGetPostsInChannel(channelId);
+    return {post: posts[0]};
+};
+
+export const Post = {
+    apiGetLastPostInChannel,
+    apiGetPostsInChannel,
+};
+
+export default Post;
diff --git a/detox/e2e/test/messaging/tap_send_button_repeatedly.e2e.js b/detox/e2e/test/messaging/tap_send_button_repeatedly.e2e.js
new file mode 100644
index 000000000..ce7a3bbd5
--- /dev/null
+++ b/detox/e2e/test/messaging/tap_send_button_repeatedly.e2e.js
@@ -0,0 +1,50 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import nodeExpect from 'expect';
+
+import {toChannelScreen} from '@support/ui/screen';
+import {Channel, Post, Setup} from '@support/server_api';
+
+describe('Messaging', () => {
+    let team;
+    let user;
+
+    beforeAll(async () => {
+        ({team, user} = await Setup.apiInit());
+
+        await toChannelScreen(user);
+    });
+
+    it('MM-T109 User can\'t send the same message repeatedly', async () => {
+        const message = Date.now().toString();
+
+        // # Type a message
+        const postInput = await element(by.id('post_input'));
+        await postInput.tap();
+        await postInput.typeText(message);
+
+        // # Tap the send button
+        const sendButton = await element(by.id('send_button'));
+        await expect(sendButton).toBeVisible();
+        await sendButton.tap();
+        await expect(sendButton).not.toExist();
+
+        // # Then tap send button repeatedly
+        const disabledSendButton = await element(by.id('disabled_send_button'));
+        await expect(disabledSendButton).toBeVisible();
+        await expect(disabledSendButton).toExist();
+        await disabledSendButton.multiTap(3);
+
+        // # Check that message is successfully posted
+        await expect(element(by.text(message))).toExist();
+
+        // # Check that no duplicate message is saved.
+        const {channel} = await Channel.apiGetChannelByName(team.name, 'town-square');
+        const {posts} = await Post.apiGetPostsInChannel(channel.id);
+        nodeExpect(posts.length).toEqual(3);
+        nodeExpect(posts[0].message).toEqual(message);
+        nodeExpect(posts[1].message).toEqual(`${user.username} joined the team.`);
+        nodeExpect(posts[2].message).toEqual('sysadmin joined the team.');
+    });
+});