diff --git a/packages/backend/src/services/suspend-user.ts b/packages/backend/src/services/suspend-user.ts
index b891a6a1c..a3c06b781 100644
--- a/packages/backend/src/services/suspend-user.ts
+++ b/packages/backend/src/services/suspend-user.ts
@@ -1,7 +1,7 @@
 import { Not, IsNull } from 'typeorm';
 import renderDelete from '@/remote/activitypub/renderer/delete.js';
 import { renderActivity } from '@/remote/activitypub/renderer/index.js';
-import { deliver } from '@/queue/index.js';
+import { DeliverManager } from '@/remote/activitypub/deliver-manager.js';
 import config from '@/config/index.js';
 import { User } from '@/models/entities/user.js';
 import { Users, Followings } from '@/models/index.js';
@@ -11,27 +11,11 @@ export async function doPostSuspend(user: { id: User['id']; host: User['host'] }
 	publishInternalEvent('userChangeSuspendedState', { id: user.id, isSuspended: true });
 
 	if (Users.isLocalUser(user)) {
-		// 知り得る全SharedInboxにDelete配信
 		const content = renderActivity(renderDelete(`${config.url}/users/${user.id}`, user));
 
-		const queue: string[] = [];
-
-		const followings = await Followings.find({
-			where: [
-				{ followerSharedInbox: Not(IsNull()) },
-				{ followeeSharedInbox: Not(IsNull()) },
-			],
-			select: ['followerSharedInbox', 'followeeSharedInbox'],
-		});
-
-		const inboxes = followings.map(x => x.followerSharedInbox || x.followeeSharedInbox);
-
-		for (const inbox of inboxes) {
-			if (inbox != null && !queue.includes(inbox)) queue.push(inbox);
-		}
-
-		for (const inbox of queue) {
-			deliver(user, content, inbox);
-		}
+		// deliver to all of known network
+		const dm = new DeliverManager(user, content);
+		dm.addEveryone();
+		await dm.execute();
 	}
 }