diff --git a/include/ircd/m/vm.h b/include/ircd/m/vm.h
index 4e5fa529e..1d9dfe518 100644
--- a/include/ircd/m/vm.h
+++ b/include/ircd/m/vm.h
@@ -120,8 +120,15 @@ struct ircd::m::vm::opts
 	/// Apply effects of the eval
 	bool effects {true};
 
-	/// Broadcast to clients/servers
-	bool notify {true};
+	/// Broadcast to clients/servers. When true, individual notify options
+	/// that follow are considered. When false, no notifications occur.
+	short notify {true};
+
+	/// Broadcast to local clients (/sync stream).
+	bool notify_clients {true};
+
+	/// Broadcast to federation servers (/federation/send/).
+	bool notify_servers {true};
 
 	/// False to allow a dirty conforms report (not recommended).
 	bool conforming {true};
diff --git a/modules/client/sync.cc b/modules/client/sync.cc
index 0774f843f..f71dce2de 100644
--- a/modules/client/sync.cc
+++ b/modules/client/sync.cc
@@ -343,6 +343,10 @@ try
 			m::vm::accept.wait_until(lock, args.timesout)
 		};
 
+		assert(accepted.opts);
+		if(!accepted.opts->notify_clients)
+			continue;
+
 		if(synchronize(client, request, args, accepted))
 			return;
 	}
diff --git a/modules/federation/sender.cc b/modules/federation/sender.cc
index 878c43278..0e934e6ea 100644
--- a/modules/federation/sender.cc
+++ b/modules/federation/sender.cc
@@ -70,8 +70,14 @@ send_worker()
 			m::vm::accept.wait(lock)
 		};
 
-		if(my(event))
-			send(event);
+		if(!my(event))
+			continue;
+
+		assert(event.opts);
+		if(!event.opts->notify_servers)
+			continue;
+
+		send(event);
 	}
 	catch(const std::exception &e)
 	{