diff --git a/server/notification-providers/mattermost.js b/server/notification-providers/mattermost.js
index 2076ad213..bade6c195 100644
--- a/server/notification-providers/mattermost.js
+++ b/server/notification-providers/mattermost.js
@@ -10,7 +10,7 @@ class Mattermost extends NotificationProvider {
         let okMsg = "Sent Successfully.";
         try {
             const mattermostUserName = notification.mattermostusername || "Uptime Kuma";
-            // If heartbeatJSON is null, assume we're testing.
+            // If heartbeatJSON is null, assume non monitoring notification (Certificate warning) or testing.
             if (heartbeatJSON == null) {
                 let mattermostTestData = {
                     username: mattermostUserName,
@@ -27,97 +27,79 @@ class Mattermost extends NotificationProvider {
             }
 
             const mattermostIconEmoji = notification.mattermosticonemo;
-            const mattermostIconUrl = notification.mattermosticonurl;
+            let mattermostIconEmojiOnline = "";
+            let mattermostIconEmojiOffline = "";
 
-            if (heartbeatJSON["status"] === DOWN) {
-                let mattermostdowndata = {
-                    username: mattermostUserName,
-                    text: "Uptime Kuma Alert",
-                    channel: mattermostChannel,
-                    icon_emoji: mattermostIconEmoji,
-                    icon_url: mattermostIconUrl,
-                    attachments: [
-                        {
-                            fallback:
-                                "Your " +
-                                monitorJSON["name"] +
-                                " service went down.",
-                            color: "#FF0000",
-                            title:
-                                "❌ " +
-                                monitorJSON["name"] +
-                                " service went down. ❌",
-                            title_link: monitorJSON["url"],
-                            fields: [
-                                {
-                                    short: true,
-                                    title: "Service Name",
-                                    value: monitorJSON["name"],
-                                },
-                                {
-                                    short: true,
-                                    title: "Time (UTC)",
-                                    value: heartbeatJSON["time"],
-                                },
-                                {
-                                    short: false,
-                                    title: "Error",
-                                    value: heartbeatJSON["msg"],
-                                },
-                            ],
-                        },
-                    ],
-                };
-                await axios.post(
-                    notification.mattermostWebhookUrl,
-                    mattermostdowndata
-                );
-                return okMsg;
-            } else if (heartbeatJSON["status"] === UP) {
-                let mattermostupdata = {
-                    username: mattermostUserName,
-                    text: "Uptime Kuma Alert",
-                    channel: mattermostChannel,
-                    icon_emoji: mattermostIconEmoji,
-                    icon_url: mattermostIconUrl,
-                    attachments: [
-                        {
-                            fallback:
-                                "Your " +
-                                monitorJSON["name"] +
-                                " service went up!",
-                            color: "#32CD32",
-                            title:
-                                "✅ " +
-                                monitorJSON["name"] +
-                                " service went up! ✅",
-                            title_link: monitorJSON["url"],
-                            fields: [
-                                {
-                                    short: true,
-                                    title: "Service Name",
-                                    value: monitorJSON["name"],
-                                },
-                                {
-                                    short: true,
-                                    title: "Time (UTC)",
-                                    value: heartbeatJSON["time"],
-                                },
-                                {
-                                    short: false,
-                                    title: "Ping",
-                                    value: heartbeatJSON["ping"] + "ms",
-                                },
-                            ],
-                        },
-                    ],
-                };
-                await axios.post(
-                    notification.mattermostWebhookUrl,
-                    mattermostupdata
-                );
-                return okMsg;
+            if (mattermostIconEmoji && typeof mattermostIconEmoji === "string") {
+                const emojiArray = mattermostIconEmoji.split(" ");
+                if (emojiArray.length >= 2) {
+                    mattermostIconEmojiOnline = emojiArray[0];
+                    mattermostIconEmojiOffline = emojiArray[1];
+                }
             }
+            const mattermostIconUrl = notification.mattermosticonurl;
+            let iconEmoji = mattermostIconEmoji;
+            let statusField = {
+                short: false,
+                title: "Error",
+                value: heartbeatJSON.msg,
+            };
+            let statusText = "unknown";
+            let color = "#000000";
+            if (heartbeatJSON.status === DOWN) {
+                iconEmoji = mattermostIconEmojiOffline || mattermostIconEmoji;
+                statusField = {
+                    short: false,
+                    title: "Error",
+                    value: heartbeatJSON.msg,
+                };
+                statusText = "down.";
+                color = "#FF0000";
+            } else if (heartbeatJSON.status === UP) {
+                iconEmoji = mattermostIconEmojiOnline || mattermostIconEmoji;
+                statusField = {
+                    short: false,
+                    title: "Ping",
+                    value: heartbeatJSON.ping + "ms",
+                };
+                statusText = "up!";
+                color = "#32CD32";
+            }
+
+            let mattermostdata = {
+                username: monitorJSON.name + " " + mattermostUserName,
+                channel: mattermostChannel,
+                icon_emoji: iconEmoji,
+                icon_url: mattermostIconUrl,
+                attachments: [
+                    {
+                        fallback:
+                            "Your " +
+                            monitorJSON.name +
+                            " service went " +
+                            statusText,
+                        color: color,
+                        title:
+                            monitorJSON.name +
+                            " service went " +
+                            statusText,
+                        title_link: monitorJSON.url,
+                        fields: [
+                            statusField,
+                            {
+                                short: true,
+                                title: "Time (UTC)",
+                                value: heartbeatJSON.time,
+                            },
+                        ],
+                    },
+                ],
+            };
+            await axios.post(
+                notification.mattermostWebhookUrl,
+                mattermostdata
+            );
+            return okMsg;
         } catch (error) {
             this.throwGeneralAxiosError(error);
         }