diff --git a/docs/channels/mattermost.md b/docs/channels/mattermost.md
index f4353180e2a..052a8cd6b12 100644
--- a/docs/channels/mattermost.md
+++ b/docs/channels/mattermost.md
@@ -70,6 +70,7 @@ Mattermost responds to DMs automatically. Channel behavior is controlled by `cha
 
 - `oncall` (default): respond only when @mentioned in channels.
 - `onmessage`: respond to every channel message.
+- `always`: respond to every message in channels (same channel behavior as `onmessage`).
 - `onchar`: respond when a message starts with a trigger prefix.
 
 Config example:
@@ -89,6 +90,25 @@ Notes:
 
 - `onchar` still responds to explicit @mentions.
 - `channels.mattermost.requireMention` is honored for legacy configs but `chatmode` is preferred.
+- Current limitation: due to Mattermost plugin event behavior (`#11797`), `chatmode: "onmessage"` and
+  `chatmode: "always"` may still require explicit group mention override to respond without @mentions.
+  Use:
+
+```json5
+{
+  channels: {
+    mattermost: {
+      groupPolicy: "open",
+      groups: {
+        "*": { requireMention: false },
+      },
+    },
+  },
+}
+```
+
+Reference: [Bug: Mattermost plugin does not receive channel message events via WebSocket #11797](https://github.com/open-webui/open-webui/issues/11797).
+Related fix scope: [fix(mattermost): honor chatmode mention fallback in group mention gating #14995](https://github.com/open-webui/open-webui/pull/14995).
 
 ## Access control (DMs)
 
@@ -133,6 +153,7 @@ Mattermost supports multiple accounts under `channels.mattermost.accounts`:
 
 ## Troubleshooting
 
-- No replies in channels: ensure the bot is in the channel and mention it (oncall), use a trigger prefix (onchar), or set `chatmode: "onmessage"`.
+- No replies in channels: ensure the bot is in the channel and use the mode behavior correctly: mention it (`oncall`), use a trigger prefix (`onchar`), or use `onmessage`/`always` with:
+  `channels.mattermost.groups["*"].requireMention = false` (and typically `groupPolicy: "open"`).
 - Auth errors: check the bot token, base URL, and whether the account is enabled.
 - Multi-account issues: env vars only apply to the `default` account.
diff --git a/src/telegram/allowed-updates.test.ts b/src/telegram/allowed-updates.test.ts
new file mode 100644
index 00000000000..86e0b5224a4
--- /dev/null
+++ b/src/telegram/allowed-updates.test.ts
@@ -0,0 +1,9 @@
+import { describe, expect, it } from "vitest";
+import { resolveTelegramAllowedUpdates } from "./allowed-updates.js";
+
+describe("resolveTelegramAllowedUpdates", () => {
+  it("includes poll_answer updates", () => {
+    const updates = resolveTelegramAllowedUpdates();
+    expect(updates).toContain("poll_answer");
+  });
+});
diff --git a/src/telegram/allowed-updates.ts b/src/telegram/allowed-updates.ts
index e32fefd096f..7dfbb7a8258 100644
--- a/src/telegram/allowed-updates.ts
+++ b/src/telegram/allowed-updates.ts
@@ -4,6 +4,9 @@ type TelegramUpdateType = (typeof API_CONSTANTS.ALL_UPDATE_TYPES)[number];
 
 export function resolveTelegramAllowedUpdates(): ReadonlyArray<TelegramUpdateType> {
   const updates = [...API_CONSTANTS.DEFAULT_UPDATE_TYPES] as TelegramUpdateType[];
+  if (!updates.includes("poll_answer")) {
+    updates.push("poll_answer");
+  }
   if (!updates.includes("message_reaction")) {
     updates.push("message_reaction");
   }
diff --git a/src/telegram/bot-handlers.ts b/src/telegram/bot-handlers.ts
index bd1a7bfa4bd..ee98a218fc6 100644
--- a/src/telegram/bot-handlers.ts
+++ b/src/telegram/bot-handlers.ts
@@ -50,6 +50,7 @@ import {
   parseModelCallbackData,
   type ProviderInfo,
 } from "./model-buttons.js";
+import { getSentPoll } from "./poll-vote-cache.js";
 import { buildInlineKeyboard } from "./send.js";
 
 export const registerTelegramHandlers = ({
@@ -749,6 +750,65 @@ export const registerTelegramHandlers = ({
     }
   });
 
+  bot.on("poll_answer", async (ctx) => {
+    try {
+      if (shouldSkipUpdate(ctx)) {
+        return;
+      }
+      const pollAnswer = (ctx.update as { poll_answer?: unknown })?.poll_answer as
+        | {
+            poll_id?: string;
+            user?: { id?: number; username?: string; first_name?: string };
+            option_ids?: number[];
+          }
+        | undefined;
+      if (!pollAnswer) {
+        return;
+      }
+      const pollId = pollAnswer?.poll_id?.trim();
+      if (!pollId) {
+        return;
+      }
+      const pollMeta = getSentPoll(pollId);
+      if (!pollMeta) {
+        return;
+      }
+      if (pollMeta.accountId && pollMeta.accountId !== accountId) {
+        return;
+      }
+      const userId = pollAnswer.user?.id;
+      if (typeof userId !== "number") {
+        return;
+      }
+      const optionIds = Array.isArray(pollAnswer.option_ids) ? pollAnswer.option_ids : [];
+      const selected = optionIds.map((id) => pollMeta.options[id] ?? `option#${id + 1}`);
+      const selectedText = selected.length > 0 ? selected.join(", ") : "(cleared vote)";
+      const syntheticText = `Poll vote update: "${pollMeta.question}" -> ${selectedText}`;
+      const syntheticMessage = {
+        message_id: Date.now(),
+        date: Math.floor(Date.now() / 1000),
+        chat: {
+          id: Number(pollMeta.chatId),
+          type: String(pollMeta.chatId).startsWith("-") ? "supergroup" : "private",
+        },
+        from: {
+          id: userId,
+          is_bot: false,
+          first_name: pollAnswer.user?.first_name ?? "User",
+          username: pollAnswer.user?.username,
+        },
+        text: syntheticText,
+      } as unknown as Message;
+      const storeAllowFrom = await loadStoreAllowFrom();
+      await processMessage(buildSyntheticContext(ctx, syntheticMessage), [], storeAllowFrom, {
+        forceWasMentioned: true,
+        messageIdOverride: `poll:${pollId}:${userId}:${Date.now()}`,
+      });
+    } catch (err) {
+      runtime.error?.(danger(`poll_answer handler failed: ${String(err)}`));
+    }
+  });
+
   // Handle group migration to supergroup (chat ID changes)
   bot.on("message:migrate_to_chat_id", async (ctx) => {
     try {
diff --git a/src/telegram/poll-vote-cache.ts b/src/telegram/poll-vote-cache.ts
new file mode 100644
index 00000000000..c65759985f3
--- /dev/null
+++ b/src/telegram/poll-vote-cache.ts
@@ -0,0 +1,35 @@
+const TTL_MS = 24 * 60 * 60 * 1000;
+
+export type TelegramSentPoll = {
+  pollId: string;
+  chatId: string;
+  question: string;
+  options: string[];
+  accountId?: string;
+  createdAt: number;
+};
+
+const pollById = new Map<string, TelegramSentPoll>();
+
+function cleanupExpired() {
+  const now = Date.now();
+  for (const [pollId, poll] of pollById) {
+    if (now - poll.createdAt > TTL_MS) {
+      pollById.delete(pollId);
+    }
+  }
+}
+
+export function recordSentPoll(poll: Omit<TelegramSentPoll, "createdAt">) {
+  cleanupExpired();
+  pollById.set(poll.pollId, { ...poll, createdAt: Date.now() });
+}
+
+export function getSentPoll(pollId: string): TelegramSentPoll | undefined {
+  cleanupExpired();
+  return pollById.get(pollId);
+}
+
+export function clearSentPollCache() {
+  pollById.clear();
+}
diff --git a/src/telegram/send.ts b/src/telegram/send.ts
index 98721b5ad08..6b20c4a6593 100644
--- a/src/telegram/send.ts
+++ b/src/telegram/send.ts
@@ -27,6 +27,7 @@ import { splitTelegramCaption } from "./caption.js";
 import { resolveTelegramFetch } from "./fetch.js";
 import { renderTelegramHtmlText } from "./format.js";
 import { isRecoverableTelegramNetworkError } from "./network-errors.js";
+import { recordSentPoll } from "./poll-vote-cache.js";
 import { makeProxyFetch } from "./proxy.js";
 import { recordSentMessage } from "./sent-message-cache.js";
 import { parseTelegramTarget, stripTelegramInternalPrefixes } from "./targets.js";
@@ -1055,6 +1056,15 @@ export async function sendPollTelegram(
   if (result?.message_id) {
     recordSentMessage(chatId, result.message_id);
   }
+  if (pollId) {
+    recordSentPoll({
+      pollId,
+      chatId: resolvedChatId,
+      question: normalizedPoll.question,
+      options: normalizedPoll.options,
+      accountId: account.accountId,
+    });
+  }
 
   recordChannelActivity({
     channel: "telegram",