Meta tests a Mail tab that could give Muse its own inbox

Why it matters

A dedicated address would turn Muse into a communications endpoint, letting Meta's agent represent users externally instead of operating only inside their accounts.

Meta is testing an unreleased Mail tab for Muse, giving its personal AI agent a dedicated place to display email conversations and potentially its own address.

TestingCatalog reported on September 18th that the control appears in Muse's web interface and opens a separate page. The interface establishes that Meta is building a distinct email view. It does not establish whether Muse will receive an independent email account.

The distinction determines how far Meta intends to push the agent. A standalone address would let people and businesses communicate directly with Muse, turning the agent into an external representative that can maintain its own correspondence. A simpler implementation would collect messages Muse reads and sends through accounts that users already connected.

Meta's existing product supports the second interpretation. The Muse launch announcement says users can grant separate permission to read email or send messages on their behalf. Muse must seek approval before sending an email, according to Meta. The current App Store listing also describes email management, connected accounts and an activity log.

The Mail tab could therefore be an interface for work Muse already performs. That would still solve a practical problem: agent actions are difficult to audit when messages, approvals and results are scattered across chat threads and external inboxes. A centralized record would give users a clearer view of what Muse received, drafted and sent.

Wang's agent moves beyond the chat window

Meta introduced Muse in the US on September 8th as an agent that works across websites and connected services, continues tasks in the background and asks for approval before sensitive actions. Meta says Muse runs inside a dedicated cloud computer with its own browser.

The launch is a central product test for Alexandr Wang (@alexandr_wang), Meta's chief AI officer and the founder of Scale AI. Wang joined Meta in 2025 and now oversees the AI push that produced the Muse models and consumer agent.

On September 18th, Wang said Muse had reached the No. 1 position among free iPhone apps in the US about a week after launch. The ranking gives Meta an early distribution win, though an App Store position measures download momentum rather than retention or successful task completion.

Muse's appeal rests on taking actions that ordinary chatbots leave to the user. Meta says the agent can fill out forms, book travel, make purchases and negotiate through its browser. Email is central to many of those jobs because reservations, customer service requests, invoices and scheduling changes often leave the browser and continue through correspondence.

A Mail tab would make that communication legible inside Muse. A dedicated address would go further by giving the agent a persistent identity that other people and software could contact without first reaching its owner.

A business-agent channel, with a larger control problem

The mailbox experiment also follows another unreleased Muse interface. TestingCatalog reported on September 10th that Meta is developing Shared Agents, a system for configuring specialized agents with their own prompts, skills and service connections, then sharing them with other users.

If Meta releases both features, email could become an operating channel for agents assigned to scheduling, sales or customer support. A business could keep correspondence attached to a specific agent instead of giving it broad access to an employee's personal account. Owners could review the resulting conversations from the Mail tab.

That design would also let outside senders place instructions and content directly in front of an agent. Meta says a separate system called Sentinel controls Muse's internet access, while sensitive actions require approval and appear in an audit trail. A mailbox would test those safeguards continuously because incoming email can contain misleading requests, malicious links or instructions intended to manipulate an automated system.

Meta would also need to make the sender identity clear. Recipients should know when they are corresponding with Muse, which person or business owns it, and whether each message was approved by a human. Those details will determine whether an agent mailbox functions as a useful delegation tool or another inbox that requires constant supervision.

Meta has not announced the Mail tab or provided a release date. The interface confirms an email workspace under development. A separate address for Muse remains one possible implementation rather than an announced feature.