diff --git a/mautrix_telegram/__main__.py b/mautrix_telegram/__main__.py
index 3d69241d..29d2f91d 100644
--- a/mautrix_telegram/__main__.py
+++ b/mautrix_telegram/__main__.py
@@ -31,7 +31,7 @@ from .context import Context
 from .db import init as init_db
 from .formatter import init as init_formatter
 from .matrix import MatrixHandler
-from .portal import init as init_portal
+from .portal import Portal, init as init_portal
 from .puppet import Puppet, init as init_puppet
 from .sqlstatestore import SQLStateStore
 from .user import User, init as init_user
@@ -97,10 +97,20 @@ class TelegramBridge(Bridge):
         init_abstract_user(context)
         init_formatter(context)
         init_portal(context)
-        puppet_startup = init_puppet(context)
-        user_startup = init_user(context)
-        bot_startup = [self.bot.start()] if self.bot else []
-        self.startup_actions = chain(puppet_startup, user_startup, bot_startup)
+        self.add_startup_actions(init_puppet(context))
+        self.add_startup_actions(init_user(context))
+        if self.bot:
+            self.add_startup_actions(self.bot.start())
+        if self.config["bridge.resend_bridge_info"]:
+            self.add_startup_actions(self.resend_bridge_info())
+
+    async def resend_bridge_info(self) -> None:
+        self.config["bridge.resend_bridge_info"] = False
+        self.config.save()
+        self.log.info("Re-sending bridge info state event to all portals")
+        for portal in Portal.all():
+            await portal.update_bridge_info()
+        self.log.info("Finished re-sending bridge info state events")
 
     def prepare_stop(self) -> None:
         for puppet in Puppet.by_custom_mxid.values():
diff --git a/mautrix_telegram/config.py b/mautrix_telegram/config.py
index 503f6c92..5e20e9a8 100644
--- a/mautrix_telegram/config.py
+++ b/mautrix_telegram/config.py
@@ -111,6 +111,7 @@ class Config(BaseBridgeConfig):
         copy("bridge.private_chat_portal_meta")
         copy("bridge.delivery_receipts")
         copy("bridge.delivery_error_reports")
+        copy("bridge.resend_bridge_info")
 
         copy("bridge.initial_power_level_overrides.group")
         copy("bridge.initial_power_level_overrides.user")
diff --git a/mautrix_telegram/db/portal.py b/mautrix_telegram/db/portal.py
index 8fbe1a5a..fa0fd9d1 100644
--- a/mautrix_telegram/db/portal.py
+++ b/mautrix_telegram/db/portal.py
@@ -13,7 +13,7 @@
 #
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
-from typing import Optional
+from typing import Optional, Iterable
 
 from sqlalchemy import Column, Integer, String, Boolean, Text, func, sql
 
@@ -56,3 +56,7 @@ class Portal(Base):
     @classmethod
     def get_by_username(cls, username: str) -> Optional['Portal']:
         return cls._select_one_or_none(func.lower(cls.c.username) == username)
+
+    @classmethod
+    def all(cls) -> Iterable['Portal']:
+        yield from cls._select_all()
diff --git a/mautrix_telegram/example-config.yaml b/mautrix_telegram/example-config.yaml
index f9eca855..283c16ed 100644
--- a/mautrix_telegram/example-config.yaml
+++ b/mautrix_telegram/example-config.yaml
@@ -219,6 +219,10 @@ bridge:
     delivery_receipts: false
     # Whether or not delivery errors should be reported as messages in the Matrix room.
     delivery_error_reports: false
+    # Set this to true to tell the bridge to re-send m.bridge events to all rooms on the next run.
+    # This field will automatically be changed back to false after it,
+    # except if the config file is not writable.
+    resend_bridge_info: false
 
     # Overrides for base power levels.
     initial_power_level_overrides:
diff --git a/mautrix_telegram/portal/base.py b/mautrix_telegram/portal/base.py
index 127cf6fa..830ff5ca 100644
--- a/mautrix_telegram/portal/base.py
+++ b/mautrix_telegram/portal/base.py
@@ -13,7 +13,7 @@
 #
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
-from typing import Awaitable, Dict, List, Optional, Tuple, Union, Any, Set, TYPE_CHECKING
+from typing import Awaitable, Dict, List, Optional, Tuple, Union, Any, Set, Iterable, TYPE_CHECKING
 from abc import ABC, abstractmethod
 import asyncio
 import logging
@@ -372,6 +372,14 @@ class BasePortal(ABC):
     # endregion
     # region Class instance lookup
 
+    @classmethod
+    def all(cls) -> Iterable['Portal']:
+        for db_portal in DBPortal.all():
+            try:
+                yield cls.by_tgid[(db_portal.tgid, db_portal.tg_receiver)]
+            except KeyError:
+                yield cls.from_db(db_portal)
+
     @classmethod
     def get_by_mxid(cls, mxid: RoomID) -> Optional['Portal']:
         try:
@@ -515,7 +523,7 @@ class BasePortal(ABC):
         pass
 
     @abstractmethod
-    async def _update_bridge_info(self) -> None:
+    async def update_bridge_info(self) -> None:
         pass
 
     @abstractmethod
diff --git a/mautrix_telegram/portal/matrix.py b/mautrix_telegram/portal/matrix.py
index b0c77cee..118e0ec7 100644
--- a/mautrix_telegram/portal/matrix.py
+++ b/mautrix_telegram/portal/matrix.py
@@ -500,7 +500,7 @@ class PortalMatrix(BasePortal, MautrixBasePortal, ABC):
         self.title = title
         self.save()
         await self._send_delivery_receipt(event_id)
-        await self._update_bridge_info()
+        await self.update_bridge_info()
 
     async def handle_matrix_avatar(self, sender: 'u.User', url: ContentURI, event_id: EventID
                                    ) -> None:
@@ -533,7 +533,7 @@ class PortalMatrix(BasePortal, MautrixBasePortal, ABC):
                 self.save()
                 break
         await self._send_delivery_receipt(event_id)
-        await self._update_bridge_info()
+        await self.update_bridge_info()
 
     async def handle_matrix_upgrade(self, sender: UserID, new_room: RoomID, event_id: EventID
                                     ) -> None:
diff --git a/mautrix_telegram/portal/metadata.py b/mautrix_telegram/portal/metadata.py
index eced61d9..863d794e 100644
--- a/mautrix_telegram/portal/metadata.py
+++ b/mautrix_telegram/portal/metadata.py
@@ -229,7 +229,7 @@ class PortalMetadata(BasePortal, ABC):
                 changed = await self._update_avatar(user, entity.photo) or changed
                 if changed:
                     self.save()
-                    await self._update_bridge_info()
+                    await self.update_bridge_info()
         if self.sync_matrix_state:
             await self.sync_matrix_members()
 
@@ -286,7 +286,7 @@ class PortalMetadata(BasePortal, ABC):
                 info["channel"]["external_url"] = f"https://t.me/{puppet.username}"
         return info
 
-    async def _update_bridge_info(self) -> None:
+    async def update_bridge_info(self) -> None:
         try:
             self.log.debug("Updating bridge info...")
             await self.main_intent.send_state_event(self.mxid, StateBridge,
@@ -664,7 +664,7 @@ class PortalMetadata(BasePortal, ABC):
 
         if changed:
             self.save()
-            await self._update_bridge_info()
+            await self.update_bridge_info()
 
     async def _update_username(self, username: str, save: bool = False) -> bool:
         if self.username == username:
diff --git a/mautrix_telegram/portal/telegram.py b/mautrix_telegram/portal/telegram.py
index 4da6be75..fe9ed18d 100644
--- a/mautrix_telegram/portal/telegram.py
+++ b/mautrix_telegram/portal/telegram.py
@@ -555,13 +555,13 @@ class PortalTelegram(BasePortal, ABC):
             return
         if isinstance(action, MessageActionChatEditTitle):
             await self._update_title(action.title, sender=sender, save=True)
-            await self._update_bridge_info()
+            await self.update_bridge_info()
         elif isinstance(action, MessageActionChatEditPhoto):
             await self._update_avatar(source, action.photo, sender=sender, save=True)
-            await self._update_bridge_info()
+            await self.update_bridge_info()
         elif isinstance(action, MessageActionChatDeletePhoto):
             await self._update_avatar(source, ChatPhotoEmpty(), sender=sender, save=True)
-            await self._update_bridge_info()
+            await self.update_bridge_info()
         elif isinstance(action, MessageActionChatAddUser):
             for user_id in action.users:
                 await self._add_telegram_user(TelegramID(user_id), source)
@@ -575,7 +575,7 @@ class PortalTelegram(BasePortal, ABC):
             # TODO encrypt
             await sender.intent_for(self).send_emote(self.mxid,
                                                      "upgraded this group to a supergroup.")
-            await self._update_bridge_info()
+            await self.update_bridge_info()
         elif isinstance(action, MessageActionGameScore):
             # TODO handle game score
             pass