diff --git a/ts/session/sending/MessageQueue.ts b/ts/session/sending/MessageQueue.ts
index 7077a2921..cecbe589d 100644
--- a/ts/session/sending/MessageQueue.ts
+++ b/ts/session/sending/MessageQueue.ts
@@ -3,13 +3,16 @@ import {
   MessageQueueInterface,
   MessageQueueInterfaceEvents,
 } from './MessageQueueInterface';
-import { ContentMessage, OpenGroupMessage } from '../messages/outgoing';
+import { ContentMessage, OpenGroupMessage, SyncMessage, SessionResetMessage } from '../messages/outgoing';
 import { PendingMessageCache } from './PendingMessageCache';
 import { JobQueue, TypedEventEmitter } from '../utils';
+import { PubKey } from '../types';
+import { ConversationController } from '../../window';
+import { MessageSender } from '.';
 
 export class MessageQueue implements MessageQueueInterface {
   public readonly events: TypedEventEmitter<MessageQueueInterfaceEvents>;
-  private readonly jobQueues: Map<string, JobQueue> = new Map();
+  private readonly jobQueues: Map<PubKey, JobQueue> = new Map();
   private readonly cache: PendingMessageCache;
 
   constructor() {
@@ -19,9 +22,11 @@ export class MessageQueue implements MessageQueueInterface {
   }
 
   public sendUsingMultiDevice(user: string, message: ContentMessage) {
-    throw new Error('Method not implemented.');
+    // this.cache
+    
+    // throw new Error('Method not implemented.');
   }
-  public send(device: string, message: ContentMessage) {
+  public send(device: PubKey, message: ContentMessage) {
     throw new Error('Method not implemented.');
   }
   public sendToGroup(message: ContentMessage | OpenGroupMessage) {
@@ -31,16 +36,57 @@ export class MessageQueue implements MessageQueueInterface {
     throw new Error('Method not implemented.');
   }
 
-  public processPending(device: string) {
+  public processPending(device: PubKey) {
     // TODO: implement
+    const SessionManager: any = {}; // TEMP FIX
+
+    const messages = this.cache.getForDevice(device);
+
+    const conversation = ConversationController.get(device.key);
+    const isMediumGroup = conversation.isMediumGroup();
+
+    const hasSession = false; // TODO ; = SessionManager.hasSession(device);
+
+    if (!isMediumGroup && !hasSession) {
+      SessionManager.sendSessionRequestIfNeeded();
+
+      return;
+    }
+
+    const jobQueue = this.getJobQueue(device);
+    messages.forEach(message => {
+      if (!jobQueue.has(message.identifier)) {
+        const promise = jobQueue.add(message.identifier, MessageSender.send(message));
+
+        promise.then(() => {
+          // Message sent; remove from cache
+          void this.cache.remove(message);
+        }).catch(() => {
+          // Message failed to send
+        });
+      }
+    });
+    
+
+
   }
 
   private processAllPending() {
     // TODO: Get all devices which are pending here
+    
   }
 
-  private queue(device: string, message: ContentMessage) {
+  private queue(device: PubKey, message: ContentMessage) {
     // TODO: implement
+    if (message instanceof SessionResetMessage) {
+      return;
+    }
+
+    const added = this.cache.add(device, message);
+    
+    // if not added?
+
+    this.processPending(device);
   }
 
   private queueOpenGroupMessage(message: OpenGroupMessage) {
@@ -48,7 +94,7 @@ export class MessageQueue implements MessageQueueInterface {
     // If so we can get open group job queue and add the send job here
   }
 
-  private getJobQueue(device: string): JobQueue {
+  private getJobQueue(device: PubKey): JobQueue {
     let queue = this.jobQueues.get(device);
     if (!queue) {
       queue = new JobQueue();
diff --git a/ts/session/sending/MessageQueueInterface.ts b/ts/session/sending/MessageQueueInterface.ts
index b160ce365..21a018cbf 100644
--- a/ts/session/sending/MessageQueueInterface.ts
+++ b/ts/session/sending/MessageQueueInterface.ts
@@ -5,6 +5,7 @@ import {
 } from '../messages/outgoing';
 import { RawMessage } from '../types/RawMessage';
 import { TypedEventEmitter } from '../utils';
+import { PubKey } from '../types';
 
 type GroupMessageType = OpenGroupMessage | ClosedGroupMessage;
 
@@ -16,7 +17,7 @@ export interface MessageQueueInterfaceEvents {
 export interface MessageQueueInterface {
   events: TypedEventEmitter<MessageQueueInterfaceEvents>;
   sendUsingMultiDevice(user: string, message: ContentMessage): void;
-  send(device: string, message: ContentMessage): void;
+  send(device: PubKey, message: ContentMessage): void;
   sendToGroup(message: GroupMessageType): void;
   sendSyncMessage(message: ContentMessage): void;
 }
diff --git a/ts/session/sending/PendingMessageCache.ts b/ts/session/sending/PendingMessageCache.ts
index 1f57a5f0c..8f2eb0711 100644
--- a/ts/session/sending/PendingMessageCache.ts
+++ b/ts/session/sending/PendingMessageCache.ts
@@ -102,7 +102,7 @@ export class PendingMessageCache {
     await this.saveToDB();
   }
 
-  public async loadFromDB() {
+  private async loadFromDB() {
     const messages = await this.getFromStorage();
     this.cache = messages;
   }